Alright, let's solve this math problem step by step. First, we have the number 377. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 57. So, we're going to take the number 377 and add it to itself 57 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

So, 377*57 = 21489