OK, let's work through this together. We're starting with 377 and we're going to multiply it by 88, which means we add 377 to itself 88 times.
Step 1: 0 + 377 = 377
Step 2: 377 + 377 = 754
Step 3: 754 + 377 = 1131
Step 4: 1131 + 377 = 1508
Step 5: 1508 + 377 = 1885
Step 6: 1885 + 377 = 2262
Step 7: 2262 + 377 = 2639
Step 8: 2639 + 377 = 3016
Step 9: 3016 + 377 = 3393
Step 10: 3393 + 377 = 3770
Step 11: 3770 + 377 = 4147
Step 12: 4147 + 377 = 4524
Step 13: 4524 + 377 = 4901
Step 14: 4901 + 377 = 5278
Step 15: 5278 + 377 = 5655
Step 16: 5655 + 377 = 6032
Step 17: 6032 + 377 = 6409
Step 18: 6409 + 377 = 6786
Step 19: 6786 + 377 = 7163
Step 20: 7163 + 377 = 7540
Step 21: 7540 + 377 = 7917
Step 22: 7917 + 377 = 8294
Step 23: 8294 + 377 = 8671
Step 24: 8671 + 377 = 9048
Step 25: 9048 + 377 = 9425
Step 26: 9425 + 377 = 9802
Step 27: 9802 + 377 = 10179
Step 28: 10179 + 377 = 10556
Step 29: 10556 + 377 = 10933
Step 30: 10933 + 377 = 11310
Step 31: 11310 + 377 = 11687
Step 32: 11687 + 377 = 12064
Step 33: 12064 + 377 = 12441
Step 34: 12441 + 377 = 12818
Step 35: 12818 + 377 = 13195
Step 36: 13195 + 377 = 13572
Step 37: 13572 + 377 = 13949
Step 38: 13949 + 377 = 14326
Step 39: 14326 + 377 = 14703
Step 40: 14703 + 377 = 15080
Step 41: 15080 + 377 = 15457
Step 42: 15457 + 377 = 15834
Step 43: 15834 + 377 = 16211
Step 44: 16211 + 377 = 16588
Step 45: 16588 + 377 = 16965
Step 46: 16965 + 377 = 17342
Step 47: 17342 + 377 = 17719
Step 48: 17719 + 377 = 18096
Step 49: 18096 + 377 = 18473
Step 50: 18473 + 377 = 18850
Step 51: 18850 + 377 = 19227
Step 52: 19227 + 377 = 19604
Step 53: 19604 + 377 = 19981
Step 54: 19981 + 377 = 20358
Step 55: 20358 + 377 = 20735
Step 56: 20735 + 377 = 21112
Step 57: 21112 + 377 = 21489
Step 58: 21489 + 377 = 21866
Step 59: 21866 + 377 = 22243
Step 60: 22243 + 377 = 22620
Step 61: 22620 + 377 = 22997
Step 62: 22997 + 377 = 23374
Step 63: 23374 + 377 = 23751
Step 64: 23751 + 377 = 24128
Step 65: 24128 + 377 = 24505
Step 66: 24505 + 377 = 24882
Step 67: 24882 + 377 = 25259
Step 68: 25259 + 377 = 25636
Step 69: 25636 + 377 = 26013
Step 70: 26013 + 377 = 26390
Step 71: 26390 + 377 = 26767
Step 72: 26767 + 377 = 27144
Step 73: 27144 + 377 = 27521
Step 74: 27521 + 377 = 27898
Step 75: 27898 + 377 = 28275
Step 76: 28275 + 377 = 28652
Step 77: 28652 + 377 = 29029
Step 78: 29029 + 377 = 29406
Step 79: 29406 + 377 = 29783
Step 80: 29783 + 377 = 30160
Step 81: 30160 + 377 = 30537
Step 82: 30537 + 377 = 30914
Step 83: 30914 + 377 = 31291
Step 84: 31291 + 377 = 31668
Step 85: 31668 + 377 = 32045
Step 86: 32045 + 377 = 32422
Step 87: 32422 + 377 = 32799
Step 88: 32799 + 377 = 33176

So, 377*88 = 33176