Sure thing, let's get straight to it. We start with 845 and we're going to multiply it by 57, which means adding 845 to itself 57 times.
Step 1: 0 + 845 = 845
Step 2: 845 + 845 = 1690
Step 3: 1690 + 845 = 2535
Step 4: 2535 + 845 = 3380
Step 5: 3380 + 845 = 4225
Step 6: 4225 + 845 = 5070
Step 7: 5070 + 845 = 5915
Step 8: 5915 + 845 = 6760
Step 9: 6760 + 845 = 7605
Step 10: 7605 + 845 = 8450
Step 11: 8450 + 845 = 9295
Step 12: 9295 + 845 = 10140
Step 13: 10140 + 845 = 10985
Step 14: 10985 + 845 = 11830
Step 15: 11830 + 845 = 12675
Step 16: 12675 + 845 = 13520
Step 17: 13520 + 845 = 14365
Step 18: 14365 + 845 = 15210
Step 19: 15210 + 845 = 16055
Step 20: 16055 + 845 = 16900
Step 21: 16900 + 845 = 17745
Step 22: 17745 + 845 = 18590
Step 23: 18590 + 845 = 19435
Step 24: 19435 + 845 = 20280
Step 25: 20280 + 845 = 21125
Step 26: 21125 + 845 = 21970
Step 27: 21970 + 845 = 22815
Step 28: 22815 + 845 = 23660
Step 29: 23660 + 845 = 24505
Step 30: 24505 + 845 = 25350
Step 31: 25350 + 845 = 26195
Step 32: 26195 + 845 = 27040
Step 33: 27040 + 845 = 27885
Step 34: 27885 + 845 = 28730
Step 35: 28730 + 845 = 29575
Step 36: 29575 + 845 = 30420
Step 37: 30420 + 845 = 31265
Step 38: 31265 + 845 = 32110
Step 39: 32110 + 845 = 32955
Step 40: 32955 + 845 = 33800
Step 41: 33800 + 845 = 34645
Step 42: 34645 + 845 = 35490
Step 43: 35490 + 845 = 36335
Step 44: 36335 + 845 = 37180
Step 45: 37180 + 845 = 38025
Step 46: 38025 + 845 = 38870
Step 47: 38870 + 845 = 39715
Step 48: 39715 + 845 = 40560
Step 49: 40560 + 845 = 41405
Step 50: 41405 + 845 = 42250
Step 51: 42250 + 845 = 43095
Step 52: 43095 + 845 = 43940
Step 53: 43940 + 845 = 44785
Step 54: 44785 + 845 = 45630
Step 55: 45630 + 845 = 46475
Step 56: 46475 + 845 = 47320
Step 57: 47320 + 845 = 48165

So, 845*57 = 48165