Alright, let's solve this math problem step by step. First, we have the number 678. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 142. So, we're going to take the number 678 and add it to itself 142 times.
Step 1: 0 + 678 = 678
Step 2: 678 + 678 = 1356
Step 3: 1356 + 678 = 2034
Step 4: 2034 + 678 = 2712
Step 5: 2712 + 678 = 3390
Step 6: 3390 + 678 = 4068
Step 7: 4068 + 678 = 4746
Step 8: 4746 + 678 = 5424
Step 9: 5424 + 678 = 6102
Step 10: 6102 + 678 = 6780
Step 11: 6780 + 678 = 7458
Step 12: 7458 + 678 = 8136
Step 13: 8136 + 678 = 8814
Step 14: 8814 + 678 = 9492
Step 15: 9492 + 678 = 10170
Step 16: 10170 + 678 = 10848
Step 17: 10848 + 678 = 11526
Step 18: 11526 + 678 = 12204
Step 19: 12204 + 678 = 12882
Step 20: 12882 + 678 = 13560
Step 21: 13560 + 678 = 14238
Step 22: 14238 + 678 = 14916
Step 23: 14916 + 678 = 15594
Step 24: 15594 + 678 = 16272
Step 25: 16272 + 678 = 16950
Step 26: 16950 + 678 = 17628
Step 27: 17628 + 678 = 18306
Step 28: 18306 + 678 = 18984
Step 29: 18984 + 678 = 19662
Step 30: 19662 + 678 = 20340
Step 31: 20340 + 678 = 21018
Step 32: 21018 + 678 = 21696
Step 33: 21696 + 678 = 22374
Step 34: 22374 + 678 = 23052
Step 35: 23052 + 678 = 23730
Step 36: 23730 + 678 = 24408
Step 37: 24408 + 678 = 25086
Step 38: 25086 + 678 = 25764
Step 39: 25764 + 678 = 26442
Step 40: 26442 + 678 = 27120
Step 41: 27120 + 678 = 27798
Step 42: 27798 + 678 = 28476
Step 43: 28476 + 678 = 29154
Step 44: 29154 + 678 = 29832
Step 45: 29832 + 678 = 30510
Step 46: 30510 + 678 = 31188
Step 47: 31188 + 678 = 31866
Step 48: 31866 + 678 = 32544
Step 49: 32544 + 678 = 33222
Step 50: 33222 + 678 = 33900
Step 51: 33900 + 678 = 34578
Step 52: 34578 + 678 = 35256
Step 53: 35256 + 678 = 35934
Step 54: 35934 + 678 = 36612
Step 55: 36612 + 678 = 37290
Step 56: 37290 + 678 = 37968
Step 57: 37968 + 678 = 38646
Step 58: 38646 + 678 = 39324
Step 59: 39324 + 678 = 40002
Step 60: 40002 + 678 = 40680
Step 61: 40680 + 678 = 41358
Step 62: 41358 + 678 = 42036
Step 63: 42036 + 678 = 42714
Step 64: 42714 + 678 = 43392
Step 65: 43392 + 678 = 44070
Step 66: 44070 + 678 = 44748
Step 67: 44748 + 678 = 45426
Step 68: 45426 + 678 = 46104
Step 69: 46104 + 678 = 46782
Step 70: 46782 + 678 = 47460
Step 71: 47460 + 678 = 48138
Step 72: 48138 + 678 = 48816
Step 73: 48816 + 678 = 49494
Step 74: 49494 + 678 = 50172
Step 75: 50172 + 678 = 50850
Step 76: 50850 + 678 = 51528
Step 77: 51528 + 678 = 52206
Step 78: 52206 + 678 = 52884
Step 79: 52884 + 678 = 53562
Step 80: 53562 + 678 = 54240
Step 81: 54240 + 678 = 54918
Step 82: 54918 + 678 = 55596
Step 83: 55596 + 678 = 56274
Step 84: 56274 + 678 = 56952
Step 85: 56952 + 678 = 57630
Step 86: 57630 + 678 = 58308
Step 87: 58308 + 678 = 58986
Step 88: 58986 + 678 = 59664
Step 89: 59664 + 678 = 60342
Step 90: 60342 + 678 = 61020
Step 91: 61020 + 678 = 61698
Step 92: 61698 + 678 = 62376
Step 93: 62376 + 678 = 63054
Step 94: 63054 + 678 = 63732
Step 95: 63732 + 678 = 64410
Step 96: 64410 + 678 = 65088
Step 97: 65088 + 678 = 65766
Step 98: 65766 + 678 = 66444
Step 99: 66444 + 678 = 67122
Step 100: 67122 + 678 = 67800
Step 101: 67800 + 678 = 68478
Step 102: 68478 + 678 = 69156
Step 103: 69156 + 678 = 69834
Step 104: 69834 + 678 = 70512
Step 105: 70512 + 678 = 71190
Step 106: 71190 + 678 = 71868
Step 107: 71868 + 678 = 72546
Step 108: 72546 + 678 = 73224
Step 109: 73224 + 678 = 73902
Step 110: 73902 + 678 = 74580
Step 111: 74580 + 678 = 75258
Step 112: 75258 + 678 = 75936
Step 113: 75936 + 678 = 76614
Step 114: 76614 + 678 = 77292
Step 115: 77292 + 678 = 77970
Step 116: 77970 + 678 = 78648
Step 117: 78648 + 678 = 79326
Step 118: 79326 + 678 = 80004
Step 119: 80004 + 678 = 80682
Step 120: 80682 + 678 = 81360
Step 121: 81360 + 678 = 82038
Step 122: 82038 + 678 = 82716
Step 123: 82716 + 678 = 83394
Step 124: 83394 + 678 = 84072
Step 125: 84072 + 678 = 84750
Step 126: 84750 + 678 = 85428
Step 127: 85428 + 678 = 86106
Step 128: 86106 + 678 = 86784
Step 129: 86784 + 678 = 87462
Step 130: 87462 + 678 = 88140
Step 131: 88140 + 678 = 88818
Step 132: 88818 + 678 = 89496
Step 133: 89496 + 678 = 90174
Step 134: 90174 + 678 = 90852
Step 135: 90852 + 678 = 91530
Step 136: 91530 + 678 = 92208
Step 137: 92208 + 678 = 92886
Step 138: 92886 + 678 = 93564
Step 139: 93564 + 678 = 94242
Step 140: 94242 + 678 = 94920
Step 141: 94920 + 678 = 95598
Step 142: 95598 + 678 = 96276

So, 678*142 = 96276