Without delay, let's solve this. We've got 786 and we will be multiplying it by 423, that is, adding 786 to itself 423 times.
Step 1: 0 + 786 = 786
Step 2: 786 + 786 = 1572
Step 3: 1572 + 786 = 2358
Step 4: 2358 + 786 = 3144
Step 5: 3144 + 786 = 3930
Step 6: 3930 + 786 = 4716
Step 7: 4716 + 786 = 5502
Step 8: 5502 + 786 = 6288
Step 9: 6288 + 786 = 7074
Step 10: 7074 + 786 = 7860
Step 11: 7860 + 786 = 8646
Step 12: 8646 + 786 = 9432
Step 13: 9432 + 786 = 10218
Step 14: 10218 + 786 = 11004
Step 15: 11004 + 786 = 11790
Step 16: 11790 + 786 = 12576
Step 17: 12576 + 786 = 13362
Step 18: 13362 + 786 = 14148
Step 19: 14148 + 786 = 14934
Step 20: 14934 + 786 = 15720
Step 21: 15720 + 786 = 16506
Step 22: 16506 + 786 = 17292
Step 23: 17292 + 786 = 18078
Step 24: 18078 + 786 = 18864
Step 25: 18864 + 786 = 19650
Step 26: 19650 + 786 = 20436
Step 27: 20436 + 786 = 21222
Step 28: 21222 + 786 = 22008
Step 29: 22008 + 786 = 22794
Step 30: 22794 + 786 = 23580
Step 31: 23580 + 786 = 24366
Step 32: 24366 + 786 = 25152
Step 33: 25152 + 786 = 25938
Step 34: 25938 + 786 = 26724
Step 35: 26724 + 786 = 27510
Step 36: 27510 + 786 = 28296
Step 37: 28296 + 786 = 29082
Step 38: 29082 + 786 = 29868
Step 39: 29868 + 786 = 30654
Step 40: 30654 + 786 = 31440
Step 41: 31440 + 786 = 32226
Step 42: 32226 + 786 = 33012
Step 43: 33012 + 786 = 33798
Step 44: 33798 + 786 = 34584
Step 45: 34584 + 786 = 35370
Step 46: 35370 + 786 = 36156
Step 47: 36156 + 786 = 36942
Step 48: 36942 + 786 = 37728
Step 49: 37728 + 786 = 38514
Step 50: 38514 + 786 = 39300
Step 51: 39300 + 786 = 40086
Step 52: 40086 + 786 = 40872
Step 53: 40872 + 786 = 41658
Step 54: 41658 + 786 = 42444
Step 55: 42444 + 786 = 43230
Step 56: 43230 + 786 = 44016
Step 57: 44016 + 786 = 44802
Step 58: 44802 + 786 = 45588
Step 59: 45588 + 786 = 46374
Step 60: 46374 + 786 = 47160
Step 61: 47160 + 786 = 47946
Step 62: 47946 + 786 = 48732
Step 63: 48732 + 786 = 49518
Step 64: 49518 + 786 = 50304
Step 65: 50304 + 786 = 51090
Step 66: 51090 + 786 = 51876
Step 67: 51876 + 786 = 52662
Step 68: 52662 + 786 = 53448
Step 69: 53448 + 786 = 54234
Step 70: 54234 + 786 = 55020
Step 71: 55020 + 786 = 55806
Step 72: 55806 + 786 = 56592
Step 73: 56592 + 786 = 57378
Step 74: 57378 + 786 = 58164
Step 75: 58164 + 786 = 58950
Step 76: 58950 + 786 = 59736
Step 77: 59736 + 786 = 60522
Step 78: 60522 + 786 = 61308
Step 79: 61308 + 786 = 62094
Step 80: 62094 + 786 = 62880
Step 81: 62880 + 786 = 63666
Step 82: 63666 + 786 = 64452
Step 83: 64452 + 786 = 65238
Step 84: 65238 + 786 = 66024
Step 85: 66024 + 786 = 66810
Step 86: 66810 + 786 = 67596
Step 87: 67596 + 786 = 68382
Step 88: 68382 + 786 = 69168
Step 89: 69168 + 786 = 69954
Step 90: 69954 + 786 = 70740
Step 91: 70740 + 786 = 71526
Step 92: 71526 + 786 = 72312
Step 93: 72312 + 786 = 73098
Step 94: 73098 + 786 = 73884
Step 95: 73884 + 786 = 74670
Step 96: 74670 + 786 = 75456
Step 97: 75456 + 786 = 76242
Step 98: 76242 + 786 = 77028
Step 99: 77028 + 786 = 77814
Step 100: 77814 + 786 = 78600
Step 101: 78600 + 786 = 79386
Step 102: 79386 + 786 = 80172
Step 103: 80172 + 786 = 80958
Step 104: 80958 + 786 = 81744
Step 105: 81744 + 786 = 82530
Step 106: 82530 + 786 = 83316
Step 107: 83316 + 786 = 84102
Step 108: 84102 + 786 = 84888
Step 109: 84888 + 786 = 85674
Step 110: 85674 + 786 = 86460
Step 111: 86460 + 786 = 87246
Step 112: 87246 + 786 = 88032
Step 113: 88032 + 786 = 88818
Step 114: 88818 + 786 = 89604
Step 115: 89604 + 786 = 90390
Step 116: 90390 + 786 = 91176
Step 117: 91176 + 786 = 91962
Step 118: 91962 + 786 = 92748
Step 119: 92748 + 786 = 93534
Step 120: 93534 + 786 = 94320
Step 121: 94320 + 786 = 95106
Step 122: 95106 + 786 = 95892
Step 123: 95892 + 786 = 96678
Step 124: 96678 + 786 = 97464
Step 125: 97464 + 786 = 98250
Step 126: 98250 + 786 = 99036
Step 127: 99036 + 786 = 99822
Step 128: 99822 + 786 = 100608
Step 129: 100608 + 786 = 101394
Step 130: 101394 + 786 = 102180
Step 131: 102180 + 786 = 102966
Step 132: 102966 + 786 = 103752
Step 133: 103752 + 786 = 104538
Step 134: 104538 + 786 = 105324
Step 135: 105324 + 786 = 106110
Step 136: 106110 + 786 = 106896
Step 137: 106896 + 786 = 107682
Step 138: 107682 + 786 = 108468
Step 139: 108468 + 786 = 109254
Step 140: 109254 + 786 = 110040
Step 141: 110040 + 786 = 110826
Step 142: 110826 + 786 = 111612
Step 143: 111612 + 786 = 112398
Step 144: 112398 + 786 = 113184
Step 145: 113184 + 786 = 113970
Step 146: 113970 + 786 = 114756
Step 147: 114756 + 786 = 115542
Step 148: 115542 + 786 = 116328
Step 149: 116328 + 786 = 117114
Step 150: 117114 + 786 = 117900
Step 151: 117900 + 786 = 118686
Step 152: 118686 + 786 = 119472
Step 153: 119472 + 786 = 120258
Step 154: 120258 + 786 = 121044
Step 155: 121044 + 786 = 121830
Step 156: 121830 + 786 = 122616
Step 157: 122616 + 786 = 123402
Step 158: 123402 + 786 = 124188
Step 159: 124188 + 786 = 124974
Step 160: 124974 + 786 = 125760
Step 161: 125760 + 786 = 126546
Step 162: 126546 + 786 = 127332
Step 163: 127332 + 786 = 128118
Step 164: 128118 + 786 = 128904
Step 165: 128904 + 786 = 129690
Step 166: 129690 + 786 = 130476
Step 167: 130476 + 786 = 131262
Step 168: 131262 + 786 = 132048
Step 169: 132048 + 786 = 132834
Step 170: 132834 + 786 = 133620
Step 171: 133620 + 786 = 134406
Step 172: 134406 + 786 = 135192
Step 173: 135192 + 786 = 135978
Step 174: 135978 + 786 = 136764
Step 175: 136764 + 786 = 137550
Step 176: 137550 + 786 = 138336
Step 177: 138336 + 786 = 139122
Step 178: 139122 + 786 = 139908
Step 179: 139908 + 786 = 140694
Step 180: 140694 + 786 = 141480
Step 181: 141480 + 786 = 142266
Step 182: 142266 + 786 = 143052
Step 183: 143052 + 786 = 143838
Step 184: 143838 + 786 = 144624
Step 185: 144624 + 786 = 145410
Step 186: 145410 + 786 = 146196
Step 187: 146196 + 786 = 146982
Step 188: 146982 + 786 = 147768
Step 189: 147768 + 786 = 148554
Step 190: 148554 + 786 = 149340
Step 191: 149340 + 786 = 150126
Step 192: 150126 + 786 = 150912
Step 193: 150912 + 786 = 151698
Step 194: 151698 + 786 = 152484
Step 195: 152484 + 786 = 153270
Step 196: 153270 + 786 = 154056
Step 197: 154056 + 786 = 154842
Step 198: 154842 + 786 = 155628
Step 199: 155628 + 786 = 156414
Step 200: 156414 + 786 = 157200
Step 201: 157200 + 786 = 157986
Step 202: 157986 + 786 = 158772
Step 203: 158772 + 786 = 159558
Step 204: 159558 + 786 = 160344
Step 205: 160344 + 786 = 161130
Step 206: 161130 + 786 = 161916
Step 207: 161916 + 786 = 162702
Step 208: 162702 + 786 = 163488
Step 209: 163488 + 786 = 164274
Step 210: 164274 + 786 = 165060
Step 211: 165060 + 786 = 165846
Step 212: 165846 + 786 = 166632
Step 213: 166632 + 786 = 167418
Step 214: 167418 + 786 = 168204
Step 215: 168204 + 786 = 168990
Step 216: 168990 + 786 = 169776
Step 217: 169776 + 786 = 170562
Step 218: 170562 + 786 = 171348
Step 219: 171348 + 786 = 172134
Step 220: 172134 + 786 = 172920
Step 221: 172920 + 786 = 173706
Step 222: 173706 + 786 = 174492
Step 223: 174492 + 786 = 175278
Step 224: 175278 + 786 = 176064
Step 225: 176064 + 786 = 176850
Step 226: 176850 + 786 = 177636
Step 227: 177636 + 786 = 178422
Step 228: 178422 + 786 = 179208
Step 229: 179208 + 786 = 179994
Step 230: 179994 + 786 = 180780
Step 231: 180780 + 786 = 181566
Step 232: 181566 + 786 = 182352
Step 233: 182352 + 786 = 183138
Step 234: 183138 + 786 = 183924
Step 235: 183924 + 786 = 184710
Step 236: 184710 + 786 = 185496
Step 237: 185496 + 786 = 186282
Step 238: 186282 + 786 = 187068
Step 239: 187068 + 786 = 187854
Step 240: 187854 + 786 = 188640
Step 241: 188640 + 786 = 189426
Step 242: 189426 + 786 = 190212
Step 243: 190212 + 786 = 190998
Step 244: 190998 + 786 = 191784
Step 245: 191784 + 786 = 192570
Step 246: 192570 + 786 = 193356
Step 247: 193356 + 786 = 194142
Step 248: 194142 + 786 = 194928
Step 249: 194928 + 786 = 195714
Step 250: 195714 + 786 = 196500
Step 251: 196500 + 786 = 197286
Step 252: 197286 + 786 = 198072
Step 253: 198072 + 786 = 198858
Step 254: 198858 + 786 = 199644
Step 255: 199644 + 786 = 200430
Step 256: 200430 + 786 = 201216
Step 257: 201216 + 786 = 202002
Step 258: 202002 + 786 = 202788
Step 259: 202788 + 786 = 203574
Step 260: 203574 + 786 = 204360
Step 261: 204360 + 786 = 205146
Step 262: 205146 + 786 = 205932
Step 263: 205932 + 786 = 206718
Step 264: 206718 + 786 = 207504
Step 265: 207504 + 786 = 208290
Step 266: 208290 + 786 = 209076
Step 267: 209076 + 786 = 209862
Step 268: 209862 + 786 = 210648
Step 269: 210648 + 786 = 211434
Step 270: 211434 + 786 = 212220
Step 271: 212220 + 786 = 213006
Step 272: 213006 + 786 = 213792
Step 273: 213792 + 786 = 214578
Step 274: 214578 + 786 = 215364
Step 275: 215364 + 786 = 216150
Step 276: 216150 + 786 = 216936
Step 277: 216936 + 786 = 217722
Step 278: 217722 + 786 = 218508
Step 279: 218508 + 786 = 219294
Step 280: 219294 + 786 = 220080
Step 281: 220080 + 786 = 220866
Step 282: 220866 + 786 = 221652
Step 283: 221652 + 786 = 222438
Step 284: 222438 + 786 = 223224
Step 285: 223224 + 786 = 224010
Step 286: 224010 + 786 = 224796
Step 287: 224796 + 786 = 225582
Step 288: 225582 + 786 = 226368
Step 289: 226368 + 786 = 227154
Step 290: 227154 + 786 = 227940
Step 291: 227940 + 786 = 228726
Step 292: 228726 + 786 = 229512
Step 293: 229512 + 786 = 230298
Step 294: 230298 + 786 = 231084
Step 295: 231084 + 786 = 231870
Step 296: 231870 + 786 = 232656
Step 297: 232656 + 786 = 233442
Step 298: 233442 + 786 = 234228
Step 299: 234228 + 786 = 235014
Step 300: 235014 + 786 = 235800
Step 301: 235800 + 786 = 236586
Step 302: 236586 + 786 = 237372
Step 303: 237372 + 786 = 238158
Step 304: 238158 + 786 = 238944
Step 305: 238944 + 786 = 239730
Step 306: 239730 + 786 = 240516
Step 307: 240516 + 786 = 241302
Step 308: 241302 + 786 = 242088
Step 309: 242088 + 786 = 242874
Step 310: 242874 + 786 = 243660
Step 311: 243660 + 786 = 244446
Step 312: 244446 + 786 = 245232
Step 313: 245232 + 786 = 246018
Step 314: 246018 + 786 = 246804
Step 315: 246804 + 786 = 247590
Step 316: 247590 + 786 = 248376
Step 317: 248376 + 786 = 249162
Step 318: 249162 + 786 = 249948
Step 319: 249948 + 786 = 250734
Step 320: 250734 + 786 = 251520
Step 321: 251520 + 786 = 252306
Step 322: 252306 + 786 = 253092
Step 323: 253092 + 786 = 253878
Step 324: 253878 + 786 = 254664
Step 325: 254664 + 786 = 255450
Step 326: 255450 + 786 = 256236
Step 327: 256236 + 786 = 257022
Step 328: 257022 + 786 = 257808
Step 329: 257808 + 786 = 258594
Step 330: 258594 + 786 = 259380
Step 331: 259380 + 786 = 260166
Step 332: 260166 + 786 = 260952
Step 333: 260952 + 786 = 261738
Step 334: 261738 + 786 = 262524
Step 335: 262524 + 786 = 263310
Step 336: 263310 + 786 = 264096
Step 337: 264096 + 786 = 264882
Step 338: 264882 + 786 = 265668
Step 339: 265668 + 786 = 266454
Step 340: 266454 + 786 = 267240
Step 341: 267240 + 786 = 268026
Step 342: 268026 + 786 = 268812
Step 343: 268812 + 786 = 269598
Step 344: 269598 + 786 = 270384
Step 345: 270384 + 786 = 271170
Step 346: 271170 + 786 = 271956
Step 347: 271956 + 786 = 272742
Step 348: 272742 + 786 = 273528
Step 349: 273528 + 786 = 274314
Step 350: 274314 + 786 = 275100
Step 351: 275100 + 786 = 275886
Step 352: 275886 + 786 = 276672
Step 353: 276672 + 786 = 277458
Step 354: 277458 + 786 = 278244
Step 355: 278244 + 786 = 279030
Step 356: 279030 + 786 = 279816
Step 357: 279816 + 786 = 280602
Step 358: 280602 + 786 = 281388
Step 359: 281388 + 786 = 282174
Step 360: 282174 + 786 = 282960
Step 361: 282960 + 786 = 283746
Step 362: 283746 + 786 = 284532
Step 363: 284532 + 786 = 285318
Step 364: 285318 + 786 = 286104
Step 365: 286104 + 786 = 286890
Step 366: 286890 + 786 = 287676
Step 367: 287676 + 786 = 288462
Step 368: 288462 + 786 = 289248
Step 369: 289248 + 786 = 290034
Step 370: 290034 + 786 = 290820
Step 371: 290820 + 786 = 291606
Step 372: 291606 + 786 = 292392
Step 373: 292392 + 786 = 293178
Step 374: 293178 + 786 = 293964
Step 375: 293964 + 786 = 294750
Step 376: 294750 + 786 = 295536
Step 377: 295536 + 786 = 296322
Step 378: 296322 + 786 = 297108
Step 379: 297108 + 786 = 297894
Step 380: 297894 + 786 = 298680
Step 381: 298680 + 786 = 299466
Step 382: 299466 + 786 = 300252
Step 383: 300252 + 786 = 301038
Step 384: 301038 + 786 = 301824
Step 385: 301824 + 786 = 302610
Step 386: 302610 + 786 = 303396
Step 387: 303396 + 786 = 304182
Step 388: 304182 + 786 = 304968
Step 389: 304968 + 786 = 305754
Step 390: 305754 + 786 = 306540
Step 391: 306540 + 786 = 307326
Step 392: 307326 + 786 = 308112
Step 393: 308112 + 786 = 308898
Step 394: 308898 + 786 = 309684
Step 395: 309684 + 786 = 310470
Step 396: 310470 + 786 = 311256
Step 397: 311256 + 786 = 312042
Step 398: 312042 + 786 = 312828
Step 399: 312828 + 786 = 313614
Step 400: 313614 + 786 = 314400
Step 401: 314400 + 786 = 315186
Step 402: 315186 + 786 = 315972
Step 403: 315972 + 786 = 316758
Step 404: 316758 + 786 = 317544
Step 405: 317544 + 786 = 318330
Step 406: 318330 + 786 = 319116
Step 407: 319116 + 786 = 319902
Step 408: 319902 + 786 = 320688
Step 409: 320688 + 786 = 321474
Step 410: 321474 + 786 = 322260
Step 411: 322260 + 786 = 323046
Step 412: 323046 + 786 = 323832
Step 413: 323832 + 786 = 324618
Step 414: 324618 + 786 = 325404
Step 415: 325404 + 786 = 326190
Step 416: 326190 + 786 = 326976
Step 417: 326976 + 786 = 327762
Step 418: 327762 + 786 = 328548
Step 419: 328548 + 786 = 329334
Step 420: 329334 + 786 = 330120
Step 421: 330120 + 786 = 330906
Step 422: 330906 + 786 = 331692
Step 423: 331692 + 786 = 332478

So, 786*423 = 332478