OK, let's work through this together. We're starting with 157 and we're going to multiply it by 113, which means we add 157 to itself 113 times.
Step 1: 0 + 157 = 157
Step 2: 157 + 157 = 314
Step 3: 314 + 157 = 471
Step 4: 471 + 157 = 628
Step 5: 628 + 157 = 785
Step 6: 785 + 157 = 942
Step 7: 942 + 157 = 1099
Step 8: 1099 + 157 = 1256
Step 9: 1256 + 157 = 1413
Step 10: 1413 + 157 = 1570
Step 11: 1570 + 157 = 1727
Step 12: 1727 + 157 = 1884
Step 13: 1884 + 157 = 2041
Step 14: 2041 + 157 = 2198
Step 15: 2198 + 157 = 2355
Step 16: 2355 + 157 = 2512
Step 17: 2512 + 157 = 2669
Step 18: 2669 + 157 = 2826
Step 19: 2826 + 157 = 2983
Step 20: 2983 + 157 = 3140
Step 21: 3140 + 157 = 3297
Step 22: 3297 + 157 = 3454
Step 23: 3454 + 157 = 3611
Step 24: 3611 + 157 = 3768
Step 25: 3768 + 157 = 3925
Step 26: 3925 + 157 = 4082
Step 27: 4082 + 157 = 4239
Step 28: 4239 + 157 = 4396
Step 29: 4396 + 157 = 4553
Step 30: 4553 + 157 = 4710
Step 31: 4710 + 157 = 4867
Step 32: 4867 + 157 = 5024
Step 33: 5024 + 157 = 5181
Step 34: 5181 + 157 = 5338
Step 35: 5338 + 157 = 5495
Step 36: 5495 + 157 = 5652
Step 37: 5652 + 157 = 5809
Step 38: 5809 + 157 = 5966
Step 39: 5966 + 157 = 6123
Step 40: 6123 + 157 = 6280
Step 41: 6280 + 157 = 6437
Step 42: 6437 + 157 = 6594
Step 43: 6594 + 157 = 6751
Step 44: 6751 + 157 = 6908
Step 45: 6908 + 157 = 7065
Step 46: 7065 + 157 = 7222
Step 47: 7222 + 157 = 7379
Step 48: 7379 + 157 = 7536
Step 49: 7536 + 157 = 7693
Step 50: 7693 + 157 = 7850
Step 51: 7850 + 157 = 8007
Step 52: 8007 + 157 = 8164
Step 53: 8164 + 157 = 8321
Step 54: 8321 + 157 = 8478
Step 55: 8478 + 157 = 8635
Step 56: 8635 + 157 = 8792
Step 57: 8792 + 157 = 8949
Step 58: 8949 + 157 = 9106
Step 59: 9106 + 157 = 9263
Step 60: 9263 + 157 = 9420
Step 61: 9420 + 157 = 9577
Step 62: 9577 + 157 = 9734
Step 63: 9734 + 157 = 9891
Step 64: 9891 + 157 = 10048
Step 65: 10048 + 157 = 10205
Step 66: 10205 + 157 = 10362
Step 67: 10362 + 157 = 10519
Step 68: 10519 + 157 = 10676
Step 69: 10676 + 157 = 10833
Step 70: 10833 + 157 = 10990
Step 71: 10990 + 157 = 11147
Step 72: 11147 + 157 = 11304
Step 73: 11304 + 157 = 11461
Step 74: 11461 + 157 = 11618
Step 75: 11618 + 157 = 11775
Step 76: 11775 + 157 = 11932
Step 77: 11932 + 157 = 12089
Step 78: 12089 + 157 = 12246
Step 79: 12246 + 157 = 12403
Step 80: 12403 + 157 = 12560
Step 81: 12560 + 157 = 12717
Step 82: 12717 + 157 = 12874
Step 83: 12874 + 157 = 13031
Step 84: 13031 + 157 = 13188
Step 85: 13188 + 157 = 13345
Step 86: 13345 + 157 = 13502
Step 87: 13502 + 157 = 13659
Step 88: 13659 + 157 = 13816
Step 89: 13816 + 157 = 13973
Step 90: 13973 + 157 = 14130
Step 91: 14130 + 157 = 14287
Step 92: 14287 + 157 = 14444
Step 93: 14444 + 157 = 14601
Step 94: 14601 + 157 = 14758
Step 95: 14758 + 157 = 14915
Step 96: 14915 + 157 = 15072
Step 97: 15072 + 157 = 15229
Step 98: 15229 + 157 = 15386
Step 99: 15386 + 157 = 15543
Step 100: 15543 + 157 = 15700
Step 101: 15700 + 157 = 15857
Step 102: 15857 + 157 = 16014
Step 103: 16014 + 157 = 16171
Step 104: 16171 + 157 = 16328
Step 105: 16328 + 157 = 16485
Step 106: 16485 + 157 = 16642
Step 107: 16642 + 157 = 16799
Step 108: 16799 + 157 = 16956
Step 109: 16956 + 157 = 17113
Step 110: 17113 + 157 = 17270
Step 111: 17270 + 157 = 17427
Step 112: 17427 + 157 = 17584
Step 113: 17584 + 157 = 17741

So, 157*113 = 17741