Let's roll up our sleeves and solve this. We have 761 and we're going to multiply it by 143, essentially adding 761 to itself 143 times.
Step 1: 0 + 761 = 761
Step 2: 761 + 761 = 1522
Step 3: 1522 + 761 = 2283
Step 4: 2283 + 761 = 3044
Step 5: 3044 + 761 = 3805
Step 6: 3805 + 761 = 4566
Step 7: 4566 + 761 = 5327
Step 8: 5327 + 761 = 6088
Step 9: 6088 + 761 = 6849
Step 10: 6849 + 761 = 7610
Step 11: 7610 + 761 = 8371
Step 12: 8371 + 761 = 9132
Step 13: 9132 + 761 = 9893
Step 14: 9893 + 761 = 10654
Step 15: 10654 + 761 = 11415
Step 16: 11415 + 761 = 12176
Step 17: 12176 + 761 = 12937
Step 18: 12937 + 761 = 13698
Step 19: 13698 + 761 = 14459
Step 20: 14459 + 761 = 15220
Step 21: 15220 + 761 = 15981
Step 22: 15981 + 761 = 16742
Step 23: 16742 + 761 = 17503
Step 24: 17503 + 761 = 18264
Step 25: 18264 + 761 = 19025
Step 26: 19025 + 761 = 19786
Step 27: 19786 + 761 = 20547
Step 28: 20547 + 761 = 21308
Step 29: 21308 + 761 = 22069
Step 30: 22069 + 761 = 22830
Step 31: 22830 + 761 = 23591
Step 32: 23591 + 761 = 24352
Step 33: 24352 + 761 = 25113
Step 34: 25113 + 761 = 25874
Step 35: 25874 + 761 = 26635
Step 36: 26635 + 761 = 27396
Step 37: 27396 + 761 = 28157
Step 38: 28157 + 761 = 28918
Step 39: 28918 + 761 = 29679
Step 40: 29679 + 761 = 30440
Step 41: 30440 + 761 = 31201
Step 42: 31201 + 761 = 31962
Step 43: 31962 + 761 = 32723
Step 44: 32723 + 761 = 33484
Step 45: 33484 + 761 = 34245
Step 46: 34245 + 761 = 35006
Step 47: 35006 + 761 = 35767
Step 48: 35767 + 761 = 36528
Step 49: 36528 + 761 = 37289
Step 50: 37289 + 761 = 38050
Step 51: 38050 + 761 = 38811
Step 52: 38811 + 761 = 39572
Step 53: 39572 + 761 = 40333
Step 54: 40333 + 761 = 41094
Step 55: 41094 + 761 = 41855
Step 56: 41855 + 761 = 42616
Step 57: 42616 + 761 = 43377
Step 58: 43377 + 761 = 44138
Step 59: 44138 + 761 = 44899
Step 60: 44899 + 761 = 45660
Step 61: 45660 + 761 = 46421
Step 62: 46421 + 761 = 47182
Step 63: 47182 + 761 = 47943
Step 64: 47943 + 761 = 48704
Step 65: 48704 + 761 = 49465
Step 66: 49465 + 761 = 50226
Step 67: 50226 + 761 = 50987
Step 68: 50987 + 761 = 51748
Step 69: 51748 + 761 = 52509
Step 70: 52509 + 761 = 53270
Step 71: 53270 + 761 = 54031
Step 72: 54031 + 761 = 54792
Step 73: 54792 + 761 = 55553
Step 74: 55553 + 761 = 56314
Step 75: 56314 + 761 = 57075
Step 76: 57075 + 761 = 57836
Step 77: 57836 + 761 = 58597
Step 78: 58597 + 761 = 59358
Step 79: 59358 + 761 = 60119
Step 80: 60119 + 761 = 60880
Step 81: 60880 + 761 = 61641
Step 82: 61641 + 761 = 62402
Step 83: 62402 + 761 = 63163
Step 84: 63163 + 761 = 63924
Step 85: 63924 + 761 = 64685
Step 86: 64685 + 761 = 65446
Step 87: 65446 + 761 = 66207
Step 88: 66207 + 761 = 66968
Step 89: 66968 + 761 = 67729
Step 90: 67729 + 761 = 68490
Step 91: 68490 + 761 = 69251
Step 92: 69251 + 761 = 70012
Step 93: 70012 + 761 = 70773
Step 94: 70773 + 761 = 71534
Step 95: 71534 + 761 = 72295
Step 96: 72295 + 761 = 73056
Step 97: 73056 + 761 = 73817
Step 98: 73817 + 761 = 74578
Step 99: 74578 + 761 = 75339
Step 100: 75339 + 761 = 76100
Step 101: 76100 + 761 = 76861
Step 102: 76861 + 761 = 77622
Step 103: 77622 + 761 = 78383
Step 104: 78383 + 761 = 79144
Step 105: 79144 + 761 = 79905
Step 106: 79905 + 761 = 80666
Step 107: 80666 + 761 = 81427
Step 108: 81427 + 761 = 82188
Step 109: 82188 + 761 = 82949
Step 110: 82949 + 761 = 83710
Step 111: 83710 + 761 = 84471
Step 112: 84471 + 761 = 85232
Step 113: 85232 + 761 = 85993
Step 114: 85993 + 761 = 86754
Step 115: 86754 + 761 = 87515
Step 116: 87515 + 761 = 88276
Step 117: 88276 + 761 = 89037
Step 118: 89037 + 761 = 89798
Step 119: 89798 + 761 = 90559
Step 120: 90559 + 761 = 91320
Step 121: 91320 + 761 = 92081
Step 122: 92081 + 761 = 92842
Step 123: 92842 + 761 = 93603
Step 124: 93603 + 761 = 94364
Step 125: 94364 + 761 = 95125
Step 126: 95125 + 761 = 95886
Step 127: 95886 + 761 = 96647
Step 128: 96647 + 761 = 97408
Step 129: 97408 + 761 = 98169
Step 130: 98169 + 761 = 98930
Step 131: 98930 + 761 = 99691
Step 132: 99691 + 761 = 100452
Step 133: 100452 + 761 = 101213
Step 134: 101213 + 761 = 101974
Step 135: 101974 + 761 = 102735
Step 136: 102735 + 761 = 103496
Step 137: 103496 + 761 = 104257
Step 138: 104257 + 761 = 105018
Step 139: 105018 + 761 = 105779
Step 140: 105779 + 761 = 106540
Step 141: 106540 + 761 = 107301
Step 142: 107301 + 761 = 108062
Step 143: 108062 + 761 = 108823

So, 761*143 = 108823