OK, let's crack this. We're given 634 and our task is to multiply it by 140. Essentially, we'll be adding 634 to itself 140 times.
Step 1: 0 + 634 = 634
Step 2: 634 + 634 = 1268
Step 3: 1268 + 634 = 1902
Step 4: 1902 + 634 = 2536
Step 5: 2536 + 634 = 3170
Step 6: 3170 + 634 = 3804
Step 7: 3804 + 634 = 4438
Step 8: 4438 + 634 = 5072
Step 9: 5072 + 634 = 5706
Step 10: 5706 + 634 = 6340
Step 11: 6340 + 634 = 6974
Step 12: 6974 + 634 = 7608
Step 13: 7608 + 634 = 8242
Step 14: 8242 + 634 = 8876
Step 15: 8876 + 634 = 9510
Step 16: 9510 + 634 = 10144
Step 17: 10144 + 634 = 10778
Step 18: 10778 + 634 = 11412
Step 19: 11412 + 634 = 12046
Step 20: 12046 + 634 = 12680
Step 21: 12680 + 634 = 13314
Step 22: 13314 + 634 = 13948
Step 23: 13948 + 634 = 14582
Step 24: 14582 + 634 = 15216
Step 25: 15216 + 634 = 15850
Step 26: 15850 + 634 = 16484
Step 27: 16484 + 634 = 17118
Step 28: 17118 + 634 = 17752
Step 29: 17752 + 634 = 18386
Step 30: 18386 + 634 = 19020
Step 31: 19020 + 634 = 19654
Step 32: 19654 + 634 = 20288
Step 33: 20288 + 634 = 20922
Step 34: 20922 + 634 = 21556
Step 35: 21556 + 634 = 22190
Step 36: 22190 + 634 = 22824
Step 37: 22824 + 634 = 23458
Step 38: 23458 + 634 = 24092
Step 39: 24092 + 634 = 24726
Step 40: 24726 + 634 = 25360
Step 41: 25360 + 634 = 25994
Step 42: 25994 + 634 = 26628
Step 43: 26628 + 634 = 27262
Step 44: 27262 + 634 = 27896
Step 45: 27896 + 634 = 28530
Step 46: 28530 + 634 = 29164
Step 47: 29164 + 634 = 29798
Step 48: 29798 + 634 = 30432
Step 49: 30432 + 634 = 31066
Step 50: 31066 + 634 = 31700
Step 51: 31700 + 634 = 32334
Step 52: 32334 + 634 = 32968
Step 53: 32968 + 634 = 33602
Step 54: 33602 + 634 = 34236
Step 55: 34236 + 634 = 34870
Step 56: 34870 + 634 = 35504
Step 57: 35504 + 634 = 36138
Step 58: 36138 + 634 = 36772
Step 59: 36772 + 634 = 37406
Step 60: 37406 + 634 = 38040
Step 61: 38040 + 634 = 38674
Step 62: 38674 + 634 = 39308
Step 63: 39308 + 634 = 39942
Step 64: 39942 + 634 = 40576
Step 65: 40576 + 634 = 41210
Step 66: 41210 + 634 = 41844
Step 67: 41844 + 634 = 42478
Step 68: 42478 + 634 = 43112
Step 69: 43112 + 634 = 43746
Step 70: 43746 + 634 = 44380
Step 71: 44380 + 634 = 45014
Step 72: 45014 + 634 = 45648
Step 73: 45648 + 634 = 46282
Step 74: 46282 + 634 = 46916
Step 75: 46916 + 634 = 47550
Step 76: 47550 + 634 = 48184
Step 77: 48184 + 634 = 48818
Step 78: 48818 + 634 = 49452
Step 79: 49452 + 634 = 50086
Step 80: 50086 + 634 = 50720
Step 81: 50720 + 634 = 51354
Step 82: 51354 + 634 = 51988
Step 83: 51988 + 634 = 52622
Step 84: 52622 + 634 = 53256
Step 85: 53256 + 634 = 53890
Step 86: 53890 + 634 = 54524
Step 87: 54524 + 634 = 55158
Step 88: 55158 + 634 = 55792
Step 89: 55792 + 634 = 56426
Step 90: 56426 + 634 = 57060
Step 91: 57060 + 634 = 57694
Step 92: 57694 + 634 = 58328
Step 93: 58328 + 634 = 58962
Step 94: 58962 + 634 = 59596
Step 95: 59596 + 634 = 60230
Step 96: 60230 + 634 = 60864
Step 97: 60864 + 634 = 61498
Step 98: 61498 + 634 = 62132
Step 99: 62132 + 634 = 62766
Step 100: 62766 + 634 = 63400
Step 101: 63400 + 634 = 64034
Step 102: 64034 + 634 = 64668
Step 103: 64668 + 634 = 65302
Step 104: 65302 + 634 = 65936
Step 105: 65936 + 634 = 66570
Step 106: 66570 + 634 = 67204
Step 107: 67204 + 634 = 67838
Step 108: 67838 + 634 = 68472
Step 109: 68472 + 634 = 69106
Step 110: 69106 + 634 = 69740
Step 111: 69740 + 634 = 70374
Step 112: 70374 + 634 = 71008
Step 113: 71008 + 634 = 71642
Step 114: 71642 + 634 = 72276
Step 115: 72276 + 634 = 72910
Step 116: 72910 + 634 = 73544
Step 117: 73544 + 634 = 74178
Step 118: 74178 + 634 = 74812
Step 119: 74812 + 634 = 75446
Step 120: 75446 + 634 = 76080
Step 121: 76080 + 634 = 76714
Step 122: 76714 + 634 = 77348
Step 123: 77348 + 634 = 77982
Step 124: 77982 + 634 = 78616
Step 125: 78616 + 634 = 79250
Step 126: 79250 + 634 = 79884
Step 127: 79884 + 634 = 80518
Step 128: 80518 + 634 = 81152
Step 129: 81152 + 634 = 81786
Step 130: 81786 + 634 = 82420
Step 131: 82420 + 634 = 83054
Step 132: 83054 + 634 = 83688
Step 133: 83688 + 634 = 84322
Step 134: 84322 + 634 = 84956
Step 135: 84956 + 634 = 85590
Step 136: 85590 + 634 = 86224
Step 137: 86224 + 634 = 86858
Step 138: 86858 + 634 = 87492
Step 139: 87492 + 634 = 88126
Step 140: 88126 + 634 = 88760

So, 634*140 = 88760