Let's roll up our sleeves and solve this. We have 863 and we're going to multiply it by 57, essentially adding 863 to itself 57 times.
Step 1: 0 + 863 = 863
Step 2: 863 + 863 = 1726
Step 3: 1726 + 863 = 2589
Step 4: 2589 + 863 = 3452
Step 5: 3452 + 863 = 4315
Step 6: 4315 + 863 = 5178
Step 7: 5178 + 863 = 6041
Step 8: 6041 + 863 = 6904
Step 9: 6904 + 863 = 7767
Step 10: 7767 + 863 = 8630
Step 11: 8630 + 863 = 9493
Step 12: 9493 + 863 = 10356
Step 13: 10356 + 863 = 11219
Step 14: 11219 + 863 = 12082
Step 15: 12082 + 863 = 12945
Step 16: 12945 + 863 = 13808
Step 17: 13808 + 863 = 14671
Step 18: 14671 + 863 = 15534
Step 19: 15534 + 863 = 16397
Step 20: 16397 + 863 = 17260
Step 21: 17260 + 863 = 18123
Step 22: 18123 + 863 = 18986
Step 23: 18986 + 863 = 19849
Step 24: 19849 + 863 = 20712
Step 25: 20712 + 863 = 21575
Step 26: 21575 + 863 = 22438
Step 27: 22438 + 863 = 23301
Step 28: 23301 + 863 = 24164
Step 29: 24164 + 863 = 25027
Step 30: 25027 + 863 = 25890
Step 31: 25890 + 863 = 26753
Step 32: 26753 + 863 = 27616
Step 33: 27616 + 863 = 28479
Step 34: 28479 + 863 = 29342
Step 35: 29342 + 863 = 30205
Step 36: 30205 + 863 = 31068
Step 37: 31068 + 863 = 31931
Step 38: 31931 + 863 = 32794
Step 39: 32794 + 863 = 33657
Step 40: 33657 + 863 = 34520
Step 41: 34520 + 863 = 35383
Step 42: 35383 + 863 = 36246
Step 43: 36246 + 863 = 37109
Step 44: 37109 + 863 = 37972
Step 45: 37972 + 863 = 38835
Step 46: 38835 + 863 = 39698
Step 47: 39698 + 863 = 40561
Step 48: 40561 + 863 = 41424
Step 49: 41424 + 863 = 42287
Step 50: 42287 + 863 = 43150
Step 51: 43150 + 863 = 44013
Step 52: 44013 + 863 = 44876
Step 53: 44876 + 863 = 45739
Step 54: 45739 + 863 = 46602
Step 55: 46602 + 863 = 47465
Step 56: 47465 + 863 = 48328
Step 57: 48328 + 863 = 49191

So, 863*57 = 49191