Alright, let's solve this math problem step by step. First, we have the number 811. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 159. So, we're going to take the number 811 and add it to itself 159 times.
Step 1: 0 + 811 = 811
Step 2: 811 + 811 = 1622
Step 3: 1622 + 811 = 2433
Step 4: 2433 + 811 = 3244
Step 5: 3244 + 811 = 4055
Step 6: 4055 + 811 = 4866
Step 7: 4866 + 811 = 5677
Step 8: 5677 + 811 = 6488
Step 9: 6488 + 811 = 7299
Step 10: 7299 + 811 = 8110
Step 11: 8110 + 811 = 8921
Step 12: 8921 + 811 = 9732
Step 13: 9732 + 811 = 10543
Step 14: 10543 + 811 = 11354
Step 15: 11354 + 811 = 12165
Step 16: 12165 + 811 = 12976
Step 17: 12976 + 811 = 13787
Step 18: 13787 + 811 = 14598
Step 19: 14598 + 811 = 15409
Step 20: 15409 + 811 = 16220
Step 21: 16220 + 811 = 17031
Step 22: 17031 + 811 = 17842
Step 23: 17842 + 811 = 18653
Step 24: 18653 + 811 = 19464
Step 25: 19464 + 811 = 20275
Step 26: 20275 + 811 = 21086
Step 27: 21086 + 811 = 21897
Step 28: 21897 + 811 = 22708
Step 29: 22708 + 811 = 23519
Step 30: 23519 + 811 = 24330
Step 31: 24330 + 811 = 25141
Step 32: 25141 + 811 = 25952
Step 33: 25952 + 811 = 26763
Step 34: 26763 + 811 = 27574
Step 35: 27574 + 811 = 28385
Step 36: 28385 + 811 = 29196
Step 37: 29196 + 811 = 30007
Step 38: 30007 + 811 = 30818
Step 39: 30818 + 811 = 31629
Step 40: 31629 + 811 = 32440
Step 41: 32440 + 811 = 33251
Step 42: 33251 + 811 = 34062
Step 43: 34062 + 811 = 34873
Step 44: 34873 + 811 = 35684
Step 45: 35684 + 811 = 36495
Step 46: 36495 + 811 = 37306
Step 47: 37306 + 811 = 38117
Step 48: 38117 + 811 = 38928
Step 49: 38928 + 811 = 39739
Step 50: 39739 + 811 = 40550
Step 51: 40550 + 811 = 41361
Step 52: 41361 + 811 = 42172
Step 53: 42172 + 811 = 42983
Step 54: 42983 + 811 = 43794
Step 55: 43794 + 811 = 44605
Step 56: 44605 + 811 = 45416
Step 57: 45416 + 811 = 46227
Step 58: 46227 + 811 = 47038
Step 59: 47038 + 811 = 47849
Step 60: 47849 + 811 = 48660
Step 61: 48660 + 811 = 49471
Step 62: 49471 + 811 = 50282
Step 63: 50282 + 811 = 51093
Step 64: 51093 + 811 = 51904
Step 65: 51904 + 811 = 52715
Step 66: 52715 + 811 = 53526
Step 67: 53526 + 811 = 54337
Step 68: 54337 + 811 = 55148
Step 69: 55148 + 811 = 55959
Step 70: 55959 + 811 = 56770
Step 71: 56770 + 811 = 57581
Step 72: 57581 + 811 = 58392
Step 73: 58392 + 811 = 59203
Step 74: 59203 + 811 = 60014
Step 75: 60014 + 811 = 60825
Step 76: 60825 + 811 = 61636
Step 77: 61636 + 811 = 62447
Step 78: 62447 + 811 = 63258
Step 79: 63258 + 811 = 64069
Step 80: 64069 + 811 = 64880
Step 81: 64880 + 811 = 65691
Step 82: 65691 + 811 = 66502
Step 83: 66502 + 811 = 67313
Step 84: 67313 + 811 = 68124
Step 85: 68124 + 811 = 68935
Step 86: 68935 + 811 = 69746
Step 87: 69746 + 811 = 70557
Step 88: 70557 + 811 = 71368
Step 89: 71368 + 811 = 72179
Step 90: 72179 + 811 = 72990
Step 91: 72990 + 811 = 73801
Step 92: 73801 + 811 = 74612
Step 93: 74612 + 811 = 75423
Step 94: 75423 + 811 = 76234
Step 95: 76234 + 811 = 77045
Step 96: 77045 + 811 = 77856
Step 97: 77856 + 811 = 78667
Step 98: 78667 + 811 = 79478
Step 99: 79478 + 811 = 80289
Step 100: 80289 + 811 = 81100
Step 101: 81100 + 811 = 81911
Step 102: 81911 + 811 = 82722
Step 103: 82722 + 811 = 83533
Step 104: 83533 + 811 = 84344
Step 105: 84344 + 811 = 85155
Step 106: 85155 + 811 = 85966
Step 107: 85966 + 811 = 86777
Step 108: 86777 + 811 = 87588
Step 109: 87588 + 811 = 88399
Step 110: 88399 + 811 = 89210
Step 111: 89210 + 811 = 90021
Step 112: 90021 + 811 = 90832
Step 113: 90832 + 811 = 91643
Step 114: 91643 + 811 = 92454
Step 115: 92454 + 811 = 93265
Step 116: 93265 + 811 = 94076
Step 117: 94076 + 811 = 94887
Step 118: 94887 + 811 = 95698
Step 119: 95698 + 811 = 96509
Step 120: 96509 + 811 = 97320
Step 121: 97320 + 811 = 98131
Step 122: 98131 + 811 = 98942
Step 123: 98942 + 811 = 99753
Step 124: 99753 + 811 = 100564
Step 125: 100564 + 811 = 101375
Step 126: 101375 + 811 = 102186
Step 127: 102186 + 811 = 102997
Step 128: 102997 + 811 = 103808
Step 129: 103808 + 811 = 104619
Step 130: 104619 + 811 = 105430
Step 131: 105430 + 811 = 106241
Step 132: 106241 + 811 = 107052
Step 133: 107052 + 811 = 107863
Step 134: 107863 + 811 = 108674
Step 135: 108674 + 811 = 109485
Step 136: 109485 + 811 = 110296
Step 137: 110296 + 811 = 111107
Step 138: 111107 + 811 = 111918
Step 139: 111918 + 811 = 112729
Step 140: 112729 + 811 = 113540
Step 141: 113540 + 811 = 114351
Step 142: 114351 + 811 = 115162
Step 143: 115162 + 811 = 115973
Step 144: 115973 + 811 = 116784
Step 145: 116784 + 811 = 117595
Step 146: 117595 + 811 = 118406
Step 147: 118406 + 811 = 119217
Step 148: 119217 + 811 = 120028
Step 149: 120028 + 811 = 120839
Step 150: 120839 + 811 = 121650
Step 151: 121650 + 811 = 122461
Step 152: 122461 + 811 = 123272
Step 153: 123272 + 811 = 124083
Step 154: 124083 + 811 = 124894
Step 155: 124894 + 811 = 125705
Step 156: 125705 + 811 = 126516
Step 157: 126516 + 811 = 127327
Step 158: 127327 + 811 = 128138
Step 159: 128138 + 811 = 128949

So, 811*159 = 128949