Let's get this math done. We have 173 and we're going to multiply it by 100. This is the same as taking 173 and adding it to itself 100 times.
Step 1: 0 + 173 = 173
Step 2: 173 + 173 = 346
Step 3: 346 + 173 = 519
Step 4: 519 + 173 = 692
Step 5: 692 + 173 = 865
Step 6: 865 + 173 = 1038
Step 7: 1038 + 173 = 1211
Step 8: 1211 + 173 = 1384
Step 9: 1384 + 173 = 1557
Step 10: 1557 + 173 = 1730
Step 11: 1730 + 173 = 1903
Step 12: 1903 + 173 = 2076
Step 13: 2076 + 173 = 2249
Step 14: 2249 + 173 = 2422
Step 15: 2422 + 173 = 2595
Step 16: 2595 + 173 = 2768
Step 17: 2768 + 173 = 2941
Step 18: 2941 + 173 = 3114
Step 19: 3114 + 173 = 3287
Step 20: 3287 + 173 = 3460
Step 21: 3460 + 173 = 3633
Step 22: 3633 + 173 = 3806
Step 23: 3806 + 173 = 3979
Step 24: 3979 + 173 = 4152
Step 25: 4152 + 173 = 4325
Step 26: 4325 + 173 = 4498
Step 27: 4498 + 173 = 4671
Step 28: 4671 + 173 = 4844
Step 29: 4844 + 173 = 5017
Step 30: 5017 + 173 = 5190
Step 31: 5190 + 173 = 5363
Step 32: 5363 + 173 = 5536
Step 33: 5536 + 173 = 5709
Step 34: 5709 + 173 = 5882
Step 35: 5882 + 173 = 6055
Step 36: 6055 + 173 = 6228
Step 37: 6228 + 173 = 6401
Step 38: 6401 + 173 = 6574
Step 39: 6574 + 173 = 6747
Step 40: 6747 + 173 = 6920
Step 41: 6920 + 173 = 7093
Step 42: 7093 + 173 = 7266
Step 43: 7266 + 173 = 7439
Step 44: 7439 + 173 = 7612
Step 45: 7612 + 173 = 7785
Step 46: 7785 + 173 = 7958
Step 47: 7958 + 173 = 8131
Step 48: 8131 + 173 = 8304
Step 49: 8304 + 173 = 8477
Step 50: 8477 + 173 = 8650
Step 51: 8650 + 173 = 8823
Step 52: 8823 + 173 = 8996
Step 53: 8996 + 173 = 9169
Step 54: 9169 + 173 = 9342
Step 55: 9342 + 173 = 9515
Step 56: 9515 + 173 = 9688
Step 57: 9688 + 173 = 9861
Step 58: 9861 + 173 = 10034
Step 59: 10034 + 173 = 10207
Step 60: 10207 + 173 = 10380
Step 61: 10380 + 173 = 10553
Step 62: 10553 + 173 = 10726
Step 63: 10726 + 173 = 10899
Step 64: 10899 + 173 = 11072
Step 65: 11072 + 173 = 11245
Step 66: 11245 + 173 = 11418
Step 67: 11418 + 173 = 11591
Step 68: 11591 + 173 = 11764
Step 69: 11764 + 173 = 11937
Step 70: 11937 + 173 = 12110
Step 71: 12110 + 173 = 12283
Step 72: 12283 + 173 = 12456
Step 73: 12456 + 173 = 12629
Step 74: 12629 + 173 = 12802
Step 75: 12802 + 173 = 12975
Step 76: 12975 + 173 = 13148
Step 77: 13148 + 173 = 13321
Step 78: 13321 + 173 = 13494
Step 79: 13494 + 173 = 13667
Step 80: 13667 + 173 = 13840
Step 81: 13840 + 173 = 14013
Step 82: 14013 + 173 = 14186
Step 83: 14186 + 173 = 14359
Step 84: 14359 + 173 = 14532
Step 85: 14532 + 173 = 14705
Step 86: 14705 + 173 = 14878
Step 87: 14878 + 173 = 15051
Step 88: 15051 + 173 = 15224
Step 89: 15224 + 173 = 15397
Step 90: 15397 + 173 = 15570
Step 91: 15570 + 173 = 15743
Step 92: 15743 + 173 = 15916
Step 93: 15916 + 173 = 16089
Step 94: 16089 + 173 = 16262
Step 95: 16262 + 173 = 16435
Step 96: 16435 + 173 = 16608
Step 97: 16608 + 173 = 16781
Step 98: 16781 + 173 = 16954
Step 99: 16954 + 173 = 17127
Step 100: 17127 + 173 = 17300

So, 173*100 = 17300