Let's get this math done. We have 931 and we're going to multiply it by 131. This is the same as taking 931 and adding it to itself 131 times.
Step 1: 0 + 931 = 931
Step 2: 931 + 931 = 1862
Step 3: 1862 + 931 = 2793
Step 4: 2793 + 931 = 3724
Step 5: 3724 + 931 = 4655
Step 6: 4655 + 931 = 5586
Step 7: 5586 + 931 = 6517
Step 8: 6517 + 931 = 7448
Step 9: 7448 + 931 = 8379
Step 10: 8379 + 931 = 9310
Step 11: 9310 + 931 = 10241
Step 12: 10241 + 931 = 11172
Step 13: 11172 + 931 = 12103
Step 14: 12103 + 931 = 13034
Step 15: 13034 + 931 = 13965
Step 16: 13965 + 931 = 14896
Step 17: 14896 + 931 = 15827
Step 18: 15827 + 931 = 16758
Step 19: 16758 + 931 = 17689
Step 20: 17689 + 931 = 18620
Step 21: 18620 + 931 = 19551
Step 22: 19551 + 931 = 20482
Step 23: 20482 + 931 = 21413
Step 24: 21413 + 931 = 22344
Step 25: 22344 + 931 = 23275
Step 26: 23275 + 931 = 24206
Step 27: 24206 + 931 = 25137
Step 28: 25137 + 931 = 26068
Step 29: 26068 + 931 = 26999
Step 30: 26999 + 931 = 27930
Step 31: 27930 + 931 = 28861
Step 32: 28861 + 931 = 29792
Step 33: 29792 + 931 = 30723
Step 34: 30723 + 931 = 31654
Step 35: 31654 + 931 = 32585
Step 36: 32585 + 931 = 33516
Step 37: 33516 + 931 = 34447
Step 38: 34447 + 931 = 35378
Step 39: 35378 + 931 = 36309
Step 40: 36309 + 931 = 37240
Step 41: 37240 + 931 = 38171
Step 42: 38171 + 931 = 39102
Step 43: 39102 + 931 = 40033
Step 44: 40033 + 931 = 40964
Step 45: 40964 + 931 = 41895
Step 46: 41895 + 931 = 42826
Step 47: 42826 + 931 = 43757
Step 48: 43757 + 931 = 44688
Step 49: 44688 + 931 = 45619
Step 50: 45619 + 931 = 46550
Step 51: 46550 + 931 = 47481
Step 52: 47481 + 931 = 48412
Step 53: 48412 + 931 = 49343
Step 54: 49343 + 931 = 50274
Step 55: 50274 + 931 = 51205
Step 56: 51205 + 931 = 52136
Step 57: 52136 + 931 = 53067
Step 58: 53067 + 931 = 53998
Step 59: 53998 + 931 = 54929
Step 60: 54929 + 931 = 55860
Step 61: 55860 + 931 = 56791
Step 62: 56791 + 931 = 57722
Step 63: 57722 + 931 = 58653
Step 64: 58653 + 931 = 59584
Step 65: 59584 + 931 = 60515
Step 66: 60515 + 931 = 61446
Step 67: 61446 + 931 = 62377
Step 68: 62377 + 931 = 63308
Step 69: 63308 + 931 = 64239
Step 70: 64239 + 931 = 65170
Step 71: 65170 + 931 = 66101
Step 72: 66101 + 931 = 67032
Step 73: 67032 + 931 = 67963
Step 74: 67963 + 931 = 68894
Step 75: 68894 + 931 = 69825
Step 76: 69825 + 931 = 70756
Step 77: 70756 + 931 = 71687
Step 78: 71687 + 931 = 72618
Step 79: 72618 + 931 = 73549
Step 80: 73549 + 931 = 74480
Step 81: 74480 + 931 = 75411
Step 82: 75411 + 931 = 76342
Step 83: 76342 + 931 = 77273
Step 84: 77273 + 931 = 78204
Step 85: 78204 + 931 = 79135
Step 86: 79135 + 931 = 80066
Step 87: 80066 + 931 = 80997
Step 88: 80997 + 931 = 81928
Step 89: 81928 + 931 = 82859
Step 90: 82859 + 931 = 83790
Step 91: 83790 + 931 = 84721
Step 92: 84721 + 931 = 85652
Step 93: 85652 + 931 = 86583
Step 94: 86583 + 931 = 87514
Step 95: 87514 + 931 = 88445
Step 96: 88445 + 931 = 89376
Step 97: 89376 + 931 = 90307
Step 98: 90307 + 931 = 91238
Step 99: 91238 + 931 = 92169
Step 100: 92169 + 931 = 93100
Step 101: 93100 + 931 = 94031
Step 102: 94031 + 931 = 94962
Step 103: 94962 + 931 = 95893
Step 104: 95893 + 931 = 96824
Step 105: 96824 + 931 = 97755
Step 106: 97755 + 931 = 98686
Step 107: 98686 + 931 = 99617
Step 108: 99617 + 931 = 100548
Step 109: 100548 + 931 = 101479
Step 110: 101479 + 931 = 102410
Step 111: 102410 + 931 = 103341
Step 112: 103341 + 931 = 104272
Step 113: 104272 + 931 = 105203
Step 114: 105203 + 931 = 106134
Step 115: 106134 + 931 = 107065
Step 116: 107065 + 931 = 107996
Step 117: 107996 + 931 = 108927
Step 118: 108927 + 931 = 109858
Step 119: 109858 + 931 = 110789
Step 120: 110789 + 931 = 111720
Step 121: 111720 + 931 = 112651
Step 122: 112651 + 931 = 113582
Step 123: 113582 + 931 = 114513
Step 124: 114513 + 931 = 115444
Step 125: 115444 + 931 = 116375
Step 126: 116375 + 931 = 117306
Step 127: 117306 + 931 = 118237
Step 128: 118237 + 931 = 119168
Step 129: 119168 + 931 = 120099
Step 130: 120099 + 931 = 121030
Step 131: 121030 + 931 = 121961

So, 931*131 = 121961