Let's roll up our sleeves and solve this. We have 727 and we're going to multiply it by 123, essentially adding 727 to itself 123 times.
Step 1: 0 + 727 = 727
Step 2: 727 + 727 = 1454
Step 3: 1454 + 727 = 2181
Step 4: 2181 + 727 = 2908
Step 5: 2908 + 727 = 3635
Step 6: 3635 + 727 = 4362
Step 7: 4362 + 727 = 5089
Step 8: 5089 + 727 = 5816
Step 9: 5816 + 727 = 6543
Step 10: 6543 + 727 = 7270
Step 11: 7270 + 727 = 7997
Step 12: 7997 + 727 = 8724
Step 13: 8724 + 727 = 9451
Step 14: 9451 + 727 = 10178
Step 15: 10178 + 727 = 10905
Step 16: 10905 + 727 = 11632
Step 17: 11632 + 727 = 12359
Step 18: 12359 + 727 = 13086
Step 19: 13086 + 727 = 13813
Step 20: 13813 + 727 = 14540
Step 21: 14540 + 727 = 15267
Step 22: 15267 + 727 = 15994
Step 23: 15994 + 727 = 16721
Step 24: 16721 + 727 = 17448
Step 25: 17448 + 727 = 18175
Step 26: 18175 + 727 = 18902
Step 27: 18902 + 727 = 19629
Step 28: 19629 + 727 = 20356
Step 29: 20356 + 727 = 21083
Step 30: 21083 + 727 = 21810
Step 31: 21810 + 727 = 22537
Step 32: 22537 + 727 = 23264
Step 33: 23264 + 727 = 23991
Step 34: 23991 + 727 = 24718
Step 35: 24718 + 727 = 25445
Step 36: 25445 + 727 = 26172
Step 37: 26172 + 727 = 26899
Step 38: 26899 + 727 = 27626
Step 39: 27626 + 727 = 28353
Step 40: 28353 + 727 = 29080
Step 41: 29080 + 727 = 29807
Step 42: 29807 + 727 = 30534
Step 43: 30534 + 727 = 31261
Step 44: 31261 + 727 = 31988
Step 45: 31988 + 727 = 32715
Step 46: 32715 + 727 = 33442
Step 47: 33442 + 727 = 34169
Step 48: 34169 + 727 = 34896
Step 49: 34896 + 727 = 35623
Step 50: 35623 + 727 = 36350
Step 51: 36350 + 727 = 37077
Step 52: 37077 + 727 = 37804
Step 53: 37804 + 727 = 38531
Step 54: 38531 + 727 = 39258
Step 55: 39258 + 727 = 39985
Step 56: 39985 + 727 = 40712
Step 57: 40712 + 727 = 41439
Step 58: 41439 + 727 = 42166
Step 59: 42166 + 727 = 42893
Step 60: 42893 + 727 = 43620
Step 61: 43620 + 727 = 44347
Step 62: 44347 + 727 = 45074
Step 63: 45074 + 727 = 45801
Step 64: 45801 + 727 = 46528
Step 65: 46528 + 727 = 47255
Step 66: 47255 + 727 = 47982
Step 67: 47982 + 727 = 48709
Step 68: 48709 + 727 = 49436
Step 69: 49436 + 727 = 50163
Step 70: 50163 + 727 = 50890
Step 71: 50890 + 727 = 51617
Step 72: 51617 + 727 = 52344
Step 73: 52344 + 727 = 53071
Step 74: 53071 + 727 = 53798
Step 75: 53798 + 727 = 54525
Step 76: 54525 + 727 = 55252
Step 77: 55252 + 727 = 55979
Step 78: 55979 + 727 = 56706
Step 79: 56706 + 727 = 57433
Step 80: 57433 + 727 = 58160
Step 81: 58160 + 727 = 58887
Step 82: 58887 + 727 = 59614
Step 83: 59614 + 727 = 60341
Step 84: 60341 + 727 = 61068
Step 85: 61068 + 727 = 61795
Step 86: 61795 + 727 = 62522
Step 87: 62522 + 727 = 63249
Step 88: 63249 + 727 = 63976
Step 89: 63976 + 727 = 64703
Step 90: 64703 + 727 = 65430
Step 91: 65430 + 727 = 66157
Step 92: 66157 + 727 = 66884
Step 93: 66884 + 727 = 67611
Step 94: 67611 + 727 = 68338
Step 95: 68338 + 727 = 69065
Step 96: 69065 + 727 = 69792
Step 97: 69792 + 727 = 70519
Step 98: 70519 + 727 = 71246
Step 99: 71246 + 727 = 71973
Step 100: 71973 + 727 = 72700
Step 101: 72700 + 727 = 73427
Step 102: 73427 + 727 = 74154
Step 103: 74154 + 727 = 74881
Step 104: 74881 + 727 = 75608
Step 105: 75608 + 727 = 76335
Step 106: 76335 + 727 = 77062
Step 107: 77062 + 727 = 77789
Step 108: 77789 + 727 = 78516
Step 109: 78516 + 727 = 79243
Step 110: 79243 + 727 = 79970
Step 111: 79970 + 727 = 80697
Step 112: 80697 + 727 = 81424
Step 113: 81424 + 727 = 82151
Step 114: 82151 + 727 = 82878
Step 115: 82878 + 727 = 83605
Step 116: 83605 + 727 = 84332
Step 117: 84332 + 727 = 85059
Step 118: 85059 + 727 = 85786
Step 119: 85786 + 727 = 86513
Step 120: 86513 + 727 = 87240
Step 121: 87240 + 727 = 87967
Step 122: 87967 + 727 = 88694
Step 123: 88694 + 727 = 89421

So, 727*123 = 89421