Alright, let's solve this math problem step by step. First, we have the number 9. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 243. So, we're going to take the number 9 and add it to itself 243 times.
Step 1: 0 + 9 = 9
Step 2: 9 + 9 = 18
Step 3: 18 + 9 = 27
Step 4: 27 + 9 = 36
Step 5: 36 + 9 = 45
Step 6: 45 + 9 = 54
Step 7: 54 + 9 = 63
Step 8: 63 + 9 = 72
Step 9: 72 + 9 = 81
Step 10: 81 + 9 = 90
Step 11: 90 + 9 = 99
Step 12: 99 + 9 = 108
Step 13: 108 + 9 = 117
Step 14: 117 + 9 = 126
Step 15: 126 + 9 = 135
Step 16: 135 + 9 = 144
Step 17: 144 + 9 = 153
Step 18: 153 + 9 = 162
Step 19: 162 + 9 = 171
Step 20: 171 + 9 = 180
Step 21: 180 + 9 = 189
Step 22: 189 + 9 = 198
Step 23: 198 + 9 = 207
Step 24: 207 + 9 = 216
Step 25: 216 + 9 = 225
Step 26: 225 + 9 = 234
Step 27: 234 + 9 = 243
Step 28: 243 + 9 = 252
Step 29: 252 + 9 = 261
Step 30: 261 + 9 = 270
Step 31: 270 + 9 = 279
Step 32: 279 + 9 = 288
Step 33: 288 + 9 = 297
Step 34: 297 + 9 = 306
Step 35: 306 + 9 = 315
Step 36: 315 + 9 = 324
Step 37: 324 + 9 = 333
Step 38: 333 + 9 = 342
Step 39: 342 + 9 = 351
Step 40: 351 + 9 = 360
Step 41: 360 + 9 = 369
Step 42: 369 + 9 = 378
Step 43: 378 + 9 = 387
Step 44: 387 + 9 = 396
Step 45: 396 + 9 = 405
Step 46: 405 + 9 = 414
Step 47: 414 + 9 = 423
Step 48: 423 + 9 = 432
Step 49: 432 + 9 = 441
Step 50: 441 + 9 = 450
Step 51: 450 + 9 = 459
Step 52: 459 + 9 = 468
Step 53: 468 + 9 = 477
Step 54: 477 + 9 = 486
Step 55: 486 + 9 = 495
Step 56: 495 + 9 = 504
Step 57: 504 + 9 = 513
Step 58: 513 + 9 = 522
Step 59: 522 + 9 = 531
Step 60: 531 + 9 = 540
Step 61: 540 + 9 = 549
Step 62: 549 + 9 = 558
Step 63: 558 + 9 = 567
Step 64: 567 + 9 = 576
Step 65: 576 + 9 = 585
Step 66: 585 + 9 = 594
Step 67: 594 + 9 = 603
Step 68: 603 + 9 = 612
Step 69: 612 + 9 = 621
Step 70: 621 + 9 = 630
Step 71: 630 + 9 = 639
Step 72: 639 + 9 = 648
Step 73: 648 + 9 = 657
Step 74: 657 + 9 = 666
Step 75: 666 + 9 = 675
Step 76: 675 + 9 = 684
Step 77: 684 + 9 = 693
Step 78: 693 + 9 = 702
Step 79: 702 + 9 = 711
Step 80: 711 + 9 = 720
Step 81: 720 + 9 = 729
Step 82: 729 + 9 = 738
Step 83: 738 + 9 = 747
Step 84: 747 + 9 = 756
Step 85: 756 + 9 = 765
Step 86: 765 + 9 = 774
Step 87: 774 + 9 = 783
Step 88: 783 + 9 = 792
Step 89: 792 + 9 = 801
Step 90: 801 + 9 = 810
Step 91: 810 + 9 = 819
Step 92: 819 + 9 = 828
Step 93: 828 + 9 = 837
Step 94: 837 + 9 = 846
Step 95: 846 + 9 = 855
Step 96: 855 + 9 = 864
Step 97: 864 + 9 = 873
Step 98: 873 + 9 = 882
Step 99: 882 + 9 = 891
Step 100: 891 + 9 = 900
Step 101: 900 + 9 = 909
Step 102: 909 + 9 = 918
Step 103: 918 + 9 = 927
Step 104: 927 + 9 = 936
Step 105: 936 + 9 = 945
Step 106: 945 + 9 = 954
Step 107: 954 + 9 = 963
Step 108: 963 + 9 = 972
Step 109: 972 + 9 = 981
Step 110: 981 + 9 = 990
Step 111: 990 + 9 = 999
Step 112: 999 + 9 = 1008
Step 113: 1008 + 9 = 1017
Step 114: 1017 + 9 = 1026
Step 115: 1026 + 9 = 1035
Step 116: 1035 + 9 = 1044
Step 117: 1044 + 9 = 1053
Step 118: 1053 + 9 = 1062
Step 119: 1062 + 9 = 1071
Step 120: 1071 + 9 = 1080
Step 121: 1080 + 9 = 1089
Step 122: 1089 + 9 = 1098
Step 123: 1098 + 9 = 1107
Step 124: 1107 + 9 = 1116
Step 125: 1116 + 9 = 1125
Step 126: 1125 + 9 = 1134
Step 127: 1134 + 9 = 1143
Step 128: 1143 + 9 = 1152
Step 129: 1152 + 9 = 1161
Step 130: 1161 + 9 = 1170
Step 131: 1170 + 9 = 1179
Step 132: 1179 + 9 = 1188
Step 133: 1188 + 9 = 1197
Step 134: 1197 + 9 = 1206
Step 135: 1206 + 9 = 1215
Step 136: 1215 + 9 = 1224
Step 137: 1224 + 9 = 1233
Step 138: 1233 + 9 = 1242
Step 139: 1242 + 9 = 1251
Step 140: 1251 + 9 = 1260
Step 141: 1260 + 9 = 1269
Step 142: 1269 + 9 = 1278
Step 143: 1278 + 9 = 1287
Step 144: 1287 + 9 = 1296
Step 145: 1296 + 9 = 1305
Step 146: 1305 + 9 = 1314
Step 147: 1314 + 9 = 1323
Step 148: 1323 + 9 = 1332
Step 149: 1332 + 9 = 1341
Step 150: 1341 + 9 = 1350
Step 151: 1350 + 9 = 1359
Step 152: 1359 + 9 = 1368
Step 153: 1368 + 9 = 1377
Step 154: 1377 + 9 = 1386
Step 155: 1386 + 9 = 1395
Step 156: 1395 + 9 = 1404
Step 157: 1404 + 9 = 1413
Step 158: 1413 + 9 = 1422
Step 159: 1422 + 9 = 1431
Step 160: 1431 + 9 = 1440
Step 161: 1440 + 9 = 1449
Step 162: 1449 + 9 = 1458
Step 163: 1458 + 9 = 1467
Step 164: 1467 + 9 = 1476
Step 165: 1476 + 9 = 1485
Step 166: 1485 + 9 = 1494
Step 167: 1494 + 9 = 1503
Step 168: 1503 + 9 = 1512
Step 169: 1512 + 9 = 1521
Step 170: 1521 + 9 = 1530
Step 171: 1530 + 9 = 1539
Step 172: 1539 + 9 = 1548
Step 173: 1548 + 9 = 1557
Step 174: 1557 + 9 = 1566
Step 175: 1566 + 9 = 1575
Step 176: 1575 + 9 = 1584
Step 177: 1584 + 9 = 1593
Step 178: 1593 + 9 = 1602
Step 179: 1602 + 9 = 1611
Step 180: 1611 + 9 = 1620
Step 181: 1620 + 9 = 1629
Step 182: 1629 + 9 = 1638
Step 183: 1638 + 9 = 1647
Step 184: 1647 + 9 = 1656
Step 185: 1656 + 9 = 1665
Step 186: 1665 + 9 = 1674
Step 187: 1674 + 9 = 1683
Step 188: 1683 + 9 = 1692
Step 189: 1692 + 9 = 1701
Step 190: 1701 + 9 = 1710
Step 191: 1710 + 9 = 1719
Step 192: 1719 + 9 = 1728
Step 193: 1728 + 9 = 1737
Step 194: 1737 + 9 = 1746
Step 195: 1746 + 9 = 1755
Step 196: 1755 + 9 = 1764
Step 197: 1764 + 9 = 1773
Step 198: 1773 + 9 = 1782
Step 199: 1782 + 9 = 1791
Step 200: 1791 + 9 = 1800
Step 201: 1800 + 9 = 1809
Step 202: 1809 + 9 = 1818
Step 203: 1818 + 9 = 1827
Step 204: 1827 + 9 = 1836
Step 205: 1836 + 9 = 1845
Step 206: 1845 + 9 = 1854
Step 207: 1854 + 9 = 1863
Step 208: 1863 + 9 = 1872
Step 209: 1872 + 9 = 1881
Step 210: 1881 + 9 = 1890
Step 211: 1890 + 9 = 1899
Step 212: 1899 + 9 = 1908
Step 213: 1908 + 9 = 1917
Step 214: 1917 + 9 = 1926
Step 215: 1926 + 9 = 1935
Step 216: 1935 + 9 = 1944
Step 217: 1944 + 9 = 1953
Step 218: 1953 + 9 = 1962
Step 219: 1962 + 9 = 1971
Step 220: 1971 + 9 = 1980
Step 221: 1980 + 9 = 1989
Step 222: 1989 + 9 = 1998
Step 223: 1998 + 9 = 2007
Step 224: 2007 + 9 = 2016
Step 225: 2016 + 9 = 2025
Step 226: 2025 + 9 = 2034
Step 227: 2034 + 9 = 2043
Step 228: 2043 + 9 = 2052
Step 229: 2052 + 9 = 2061
Step 230: 2061 + 9 = 2070
Step 231: 2070 + 9 = 2079
Step 232: 2079 + 9 = 2088
Step 233: 2088 + 9 = 2097
Step 234: 2097 + 9 = 2106
Step 235: 2106 + 9 = 2115
Step 236: 2115 + 9 = 2124
Step 237: 2124 + 9 = 2133
Step 238: 2133 + 9 = 2142
Step 239: 2142 + 9 = 2151
Step 240: 2151 + 9 = 2160
Step 241: 2160 + 9 = 2169
Step 242: 2169 + 9 = 2178
Step 243: 2178 + 9 = 2187

So, 9*243 = 2187