OK, let's crack this. We're given 733 and our task is to multiply it by 123. Essentially, we'll be adding 733 to itself 123 times.
Step 1: 0 + 733 = 733
Step 2: 733 + 733 = 1466
Step 3: 1466 + 733 = 2199
Step 4: 2199 + 733 = 2932
Step 5: 2932 + 733 = 3665
Step 6: 3665 + 733 = 4398
Step 7: 4398 + 733 = 5131
Step 8: 5131 + 733 = 5864
Step 9: 5864 + 733 = 6597
Step 10: 6597 + 733 = 7330
Step 11: 7330 + 733 = 8063
Step 12: 8063 + 733 = 8796
Step 13: 8796 + 733 = 9529
Step 14: 9529 + 733 = 10262
Step 15: 10262 + 733 = 10995
Step 16: 10995 + 733 = 11728
Step 17: 11728 + 733 = 12461
Step 18: 12461 + 733 = 13194
Step 19: 13194 + 733 = 13927
Step 20: 13927 + 733 = 14660
Step 21: 14660 + 733 = 15393
Step 22: 15393 + 733 = 16126
Step 23: 16126 + 733 = 16859
Step 24: 16859 + 733 = 17592
Step 25: 17592 + 733 = 18325
Step 26: 18325 + 733 = 19058
Step 27: 19058 + 733 = 19791
Step 28: 19791 + 733 = 20524
Step 29: 20524 + 733 = 21257
Step 30: 21257 + 733 = 21990
Step 31: 21990 + 733 = 22723
Step 32: 22723 + 733 = 23456
Step 33: 23456 + 733 = 24189
Step 34: 24189 + 733 = 24922
Step 35: 24922 + 733 = 25655
Step 36: 25655 + 733 = 26388
Step 37: 26388 + 733 = 27121
Step 38: 27121 + 733 = 27854
Step 39: 27854 + 733 = 28587
Step 40: 28587 + 733 = 29320
Step 41: 29320 + 733 = 30053
Step 42: 30053 + 733 = 30786
Step 43: 30786 + 733 = 31519
Step 44: 31519 + 733 = 32252
Step 45: 32252 + 733 = 32985
Step 46: 32985 + 733 = 33718
Step 47: 33718 + 733 = 34451
Step 48: 34451 + 733 = 35184
Step 49: 35184 + 733 = 35917
Step 50: 35917 + 733 = 36650
Step 51: 36650 + 733 = 37383
Step 52: 37383 + 733 = 38116
Step 53: 38116 + 733 = 38849
Step 54: 38849 + 733 = 39582
Step 55: 39582 + 733 = 40315
Step 56: 40315 + 733 = 41048
Step 57: 41048 + 733 = 41781
Step 58: 41781 + 733 = 42514
Step 59: 42514 + 733 = 43247
Step 60: 43247 + 733 = 43980
Step 61: 43980 + 733 = 44713
Step 62: 44713 + 733 = 45446
Step 63: 45446 + 733 = 46179
Step 64: 46179 + 733 = 46912
Step 65: 46912 + 733 = 47645
Step 66: 47645 + 733 = 48378
Step 67: 48378 + 733 = 49111
Step 68: 49111 + 733 = 49844
Step 69: 49844 + 733 = 50577
Step 70: 50577 + 733 = 51310
Step 71: 51310 + 733 = 52043
Step 72: 52043 + 733 = 52776
Step 73: 52776 + 733 = 53509
Step 74: 53509 + 733 = 54242
Step 75: 54242 + 733 = 54975
Step 76: 54975 + 733 = 55708
Step 77: 55708 + 733 = 56441
Step 78: 56441 + 733 = 57174
Step 79: 57174 + 733 = 57907
Step 80: 57907 + 733 = 58640
Step 81: 58640 + 733 = 59373
Step 82: 59373 + 733 = 60106
Step 83: 60106 + 733 = 60839
Step 84: 60839 + 733 = 61572
Step 85: 61572 + 733 = 62305
Step 86: 62305 + 733 = 63038
Step 87: 63038 + 733 = 63771
Step 88: 63771 + 733 = 64504
Step 89: 64504 + 733 = 65237
Step 90: 65237 + 733 = 65970
Step 91: 65970 + 733 = 66703
Step 92: 66703 + 733 = 67436
Step 93: 67436 + 733 = 68169
Step 94: 68169 + 733 = 68902
Step 95: 68902 + 733 = 69635
Step 96: 69635 + 733 = 70368
Step 97: 70368 + 733 = 71101
Step 98: 71101 + 733 = 71834
Step 99: 71834 + 733 = 72567
Step 100: 72567 + 733 = 73300
Step 101: 73300 + 733 = 74033
Step 102: 74033 + 733 = 74766
Step 103: 74766 + 733 = 75499
Step 104: 75499 + 733 = 76232
Step 105: 76232 + 733 = 76965
Step 106: 76965 + 733 = 77698
Step 107: 77698 + 733 = 78431
Step 108: 78431 + 733 = 79164
Step 109: 79164 + 733 = 79897
Step 110: 79897 + 733 = 80630
Step 111: 80630 + 733 = 81363
Step 112: 81363 + 733 = 82096
Step 113: 82096 + 733 = 82829
Step 114: 82829 + 733 = 83562
Step 115: 83562 + 733 = 84295
Step 116: 84295 + 733 = 85028
Step 117: 85028 + 733 = 85761
Step 118: 85761 + 733 = 86494
Step 119: 86494 + 733 = 87227
Step 120: 87227 + 733 = 87960
Step 121: 87960 + 733 = 88693
Step 122: 88693 + 733 = 89426
Step 123: 89426 + 733 = 90159

So, 733*123 = 90159