Without delay, let's solve this. We've got 877 and we will be multiplying it by 159, that is, adding 877 to itself 159 times.
Step 1: 0 + 877 = 877
Step 2: 877 + 877 = 1754
Step 3: 1754 + 877 = 2631
Step 4: 2631 + 877 = 3508
Step 5: 3508 + 877 = 4385
Step 6: 4385 + 877 = 5262
Step 7: 5262 + 877 = 6139
Step 8: 6139 + 877 = 7016
Step 9: 7016 + 877 = 7893
Step 10: 7893 + 877 = 8770
Step 11: 8770 + 877 = 9647
Step 12: 9647 + 877 = 10524
Step 13: 10524 + 877 = 11401
Step 14: 11401 + 877 = 12278
Step 15: 12278 + 877 = 13155
Step 16: 13155 + 877 = 14032
Step 17: 14032 + 877 = 14909
Step 18: 14909 + 877 = 15786
Step 19: 15786 + 877 = 16663
Step 20: 16663 + 877 = 17540
Step 21: 17540 + 877 = 18417
Step 22: 18417 + 877 = 19294
Step 23: 19294 + 877 = 20171
Step 24: 20171 + 877 = 21048
Step 25: 21048 + 877 = 21925
Step 26: 21925 + 877 = 22802
Step 27: 22802 + 877 = 23679
Step 28: 23679 + 877 = 24556
Step 29: 24556 + 877 = 25433
Step 30: 25433 + 877 = 26310
Step 31: 26310 + 877 = 27187
Step 32: 27187 + 877 = 28064
Step 33: 28064 + 877 = 28941
Step 34: 28941 + 877 = 29818
Step 35: 29818 + 877 = 30695
Step 36: 30695 + 877 = 31572
Step 37: 31572 + 877 = 32449
Step 38: 32449 + 877 = 33326
Step 39: 33326 + 877 = 34203
Step 40: 34203 + 877 = 35080
Step 41: 35080 + 877 = 35957
Step 42: 35957 + 877 = 36834
Step 43: 36834 + 877 = 37711
Step 44: 37711 + 877 = 38588
Step 45: 38588 + 877 = 39465
Step 46: 39465 + 877 = 40342
Step 47: 40342 + 877 = 41219
Step 48: 41219 + 877 = 42096
Step 49: 42096 + 877 = 42973
Step 50: 42973 + 877 = 43850
Step 51: 43850 + 877 = 44727
Step 52: 44727 + 877 = 45604
Step 53: 45604 + 877 = 46481
Step 54: 46481 + 877 = 47358
Step 55: 47358 + 877 = 48235
Step 56: 48235 + 877 = 49112
Step 57: 49112 + 877 = 49989
Step 58: 49989 + 877 = 50866
Step 59: 50866 + 877 = 51743
Step 60: 51743 + 877 = 52620
Step 61: 52620 + 877 = 53497
Step 62: 53497 + 877 = 54374
Step 63: 54374 + 877 = 55251
Step 64: 55251 + 877 = 56128
Step 65: 56128 + 877 = 57005
Step 66: 57005 + 877 = 57882
Step 67: 57882 + 877 = 58759
Step 68: 58759 + 877 = 59636
Step 69: 59636 + 877 = 60513
Step 70: 60513 + 877 = 61390
Step 71: 61390 + 877 = 62267
Step 72: 62267 + 877 = 63144
Step 73: 63144 + 877 = 64021
Step 74: 64021 + 877 = 64898
Step 75: 64898 + 877 = 65775
Step 76: 65775 + 877 = 66652
Step 77: 66652 + 877 = 67529
Step 78: 67529 + 877 = 68406
Step 79: 68406 + 877 = 69283
Step 80: 69283 + 877 = 70160
Step 81: 70160 + 877 = 71037
Step 82: 71037 + 877 = 71914
Step 83: 71914 + 877 = 72791
Step 84: 72791 + 877 = 73668
Step 85: 73668 + 877 = 74545
Step 86: 74545 + 877 = 75422
Step 87: 75422 + 877 = 76299
Step 88: 76299 + 877 = 77176
Step 89: 77176 + 877 = 78053
Step 90: 78053 + 877 = 78930
Step 91: 78930 + 877 = 79807
Step 92: 79807 + 877 = 80684
Step 93: 80684 + 877 = 81561
Step 94: 81561 + 877 = 82438
Step 95: 82438 + 877 = 83315
Step 96: 83315 + 877 = 84192
Step 97: 84192 + 877 = 85069
Step 98: 85069 + 877 = 85946
Step 99: 85946 + 877 = 86823
Step 100: 86823 + 877 = 87700
Step 101: 87700 + 877 = 88577
Step 102: 88577 + 877 = 89454
Step 103: 89454 + 877 = 90331
Step 104: 90331 + 877 = 91208
Step 105: 91208 + 877 = 92085
Step 106: 92085 + 877 = 92962
Step 107: 92962 + 877 = 93839
Step 108: 93839 + 877 = 94716
Step 109: 94716 + 877 = 95593
Step 110: 95593 + 877 = 96470
Step 111: 96470 + 877 = 97347
Step 112: 97347 + 877 = 98224
Step 113: 98224 + 877 = 99101
Step 114: 99101 + 877 = 99978
Step 115: 99978 + 877 = 100855
Step 116: 100855 + 877 = 101732
Step 117: 101732 + 877 = 102609
Step 118: 102609 + 877 = 103486
Step 119: 103486 + 877 = 104363
Step 120: 104363 + 877 = 105240
Step 121: 105240 + 877 = 106117
Step 122: 106117 + 877 = 106994
Step 123: 106994 + 877 = 107871
Step 124: 107871 + 877 = 108748
Step 125: 108748 + 877 = 109625
Step 126: 109625 + 877 = 110502
Step 127: 110502 + 877 = 111379
Step 128: 111379 + 877 = 112256
Step 129: 112256 + 877 = 113133
Step 130: 113133 + 877 = 114010
Step 131: 114010 + 877 = 114887
Step 132: 114887 + 877 = 115764
Step 133: 115764 + 877 = 116641
Step 134: 116641 + 877 = 117518
Step 135: 117518 + 877 = 118395
Step 136: 118395 + 877 = 119272
Step 137: 119272 + 877 = 120149
Step 138: 120149 + 877 = 121026
Step 139: 121026 + 877 = 121903
Step 140: 121903 + 877 = 122780
Step 141: 122780 + 877 = 123657
Step 142: 123657 + 877 = 124534
Step 143: 124534 + 877 = 125411
Step 144: 125411 + 877 = 126288
Step 145: 126288 + 877 = 127165
Step 146: 127165 + 877 = 128042
Step 147: 128042 + 877 = 128919
Step 148: 128919 + 877 = 129796
Step 149: 129796 + 877 = 130673
Step 150: 130673 + 877 = 131550
Step 151: 131550 + 877 = 132427
Step 152: 132427 + 877 = 133304
Step 153: 133304 + 877 = 134181
Step 154: 134181 + 877 = 135058
Step 155: 135058 + 877 = 135935
Step 156: 135935 + 877 = 136812
Step 157: 136812 + 877 = 137689
Step 158: 137689 + 877 = 138566
Step 159: 138566 + 877 = 139443

So, 877*159 = 139443