Alright, let's solve this math problem step by step. First, we have the number 157. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 136. So, we're going to take the number 157 and add it to itself 136 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
Step 114: 17741 + 157 = 17898
Step 115: 17898 + 157 = 18055
Step 116: 18055 + 157 = 18212
Step 117: 18212 + 157 = 18369
Step 118: 18369 + 157 = 18526
Step 119: 18526 + 157 = 18683
Step 120: 18683 + 157 = 18840
Step 121: 18840 + 157 = 18997
Step 122: 18997 + 157 = 19154
Step 123: 19154 + 157 = 19311
Step 124: 19311 + 157 = 19468
Step 125: 19468 + 157 = 19625
Step 126: 19625 + 157 = 19782
Step 127: 19782 + 157 = 19939
Step 128: 19939 + 157 = 20096
Step 129: 20096 + 157 = 20253
Step 130: 20253 + 157 = 20410
Step 131: 20410 + 157 = 20567
Step 132: 20567 + 157 = 20724
Step 133: 20724 + 157 = 20881
Step 134: 20881 + 157 = 21038
Step 135: 21038 + 157 = 21195
Step 136: 21195 + 157 = 21352

So, 157*136 = 21352