OK, let's work through this together. We're starting with 931 and we're going to multiply it by 57, which means we add 931 to itself 57 times.
Step 1: 0 + 931 = 931
Step 2: 931 + 931 = 1862
Step 3: 1862 + 931 = 2793
Step 4: 2793 + 931 = 3724
Step 5: 3724 + 931 = 4655
Step 6: 4655 + 931 = 5586
Step 7: 5586 + 931 = 6517
Step 8: 6517 + 931 = 7448
Step 9: 7448 + 931 = 8379
Step 10: 8379 + 931 = 9310
Step 11: 9310 + 931 = 10241
Step 12: 10241 + 931 = 11172
Step 13: 11172 + 931 = 12103
Step 14: 12103 + 931 = 13034
Step 15: 13034 + 931 = 13965
Step 16: 13965 + 931 = 14896
Step 17: 14896 + 931 = 15827
Step 18: 15827 + 931 = 16758
Step 19: 16758 + 931 = 17689
Step 20: 17689 + 931 = 18620
Step 21: 18620 + 931 = 19551
Step 22: 19551 + 931 = 20482
Step 23: 20482 + 931 = 21413
Step 24: 21413 + 931 = 22344
Step 25: 22344 + 931 = 23275
Step 26: 23275 + 931 = 24206
Step 27: 24206 + 931 = 25137
Step 28: 25137 + 931 = 26068
Step 29: 26068 + 931 = 26999
Step 30: 26999 + 931 = 27930
Step 31: 27930 + 931 = 28861
Step 32: 28861 + 931 = 29792
Step 33: 29792 + 931 = 30723
Step 34: 30723 + 931 = 31654
Step 35: 31654 + 931 = 32585
Step 36: 32585 + 931 = 33516
Step 37: 33516 + 931 = 34447
Step 38: 34447 + 931 = 35378
Step 39: 35378 + 931 = 36309
Step 40: 36309 + 931 = 37240
Step 41: 37240 + 931 = 38171
Step 42: 38171 + 931 = 39102
Step 43: 39102 + 931 = 40033
Step 44: 40033 + 931 = 40964
Step 45: 40964 + 931 = 41895
Step 46: 41895 + 931 = 42826
Step 47: 42826 + 931 = 43757
Step 48: 43757 + 931 = 44688
Step 49: 44688 + 931 = 45619
Step 50: 45619 + 931 = 46550
Step 51: 46550 + 931 = 47481
Step 52: 47481 + 931 = 48412
Step 53: 48412 + 931 = 49343
Step 54: 49343 + 931 = 50274
Step 55: 50274 + 931 = 51205
Step 56: 51205 + 931 = 52136
Step 57: 52136 + 931 = 53067

So, 931*57 = 53067