Alright, let's solve this math problem step by step. First, we have the number 427. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 158. So, we're going to take the number 427 and add it to itself 158 times.
Step 1: 0 + 427 = 427
Step 2: 427 + 427 = 854
Step 3: 854 + 427 = 1281
Step 4: 1281 + 427 = 1708
Step 5: 1708 + 427 = 2135
Step 6: 2135 + 427 = 2562
Step 7: 2562 + 427 = 2989
Step 8: 2989 + 427 = 3416
Step 9: 3416 + 427 = 3843
Step 10: 3843 + 427 = 4270
Step 11: 4270 + 427 = 4697
Step 12: 4697 + 427 = 5124
Step 13: 5124 + 427 = 5551
Step 14: 5551 + 427 = 5978
Step 15: 5978 + 427 = 6405
Step 16: 6405 + 427 = 6832
Step 17: 6832 + 427 = 7259
Step 18: 7259 + 427 = 7686
Step 19: 7686 + 427 = 8113
Step 20: 8113 + 427 = 8540
Step 21: 8540 + 427 = 8967
Step 22: 8967 + 427 = 9394
Step 23: 9394 + 427 = 9821
Step 24: 9821 + 427 = 10248
Step 25: 10248 + 427 = 10675
Step 26: 10675 + 427 = 11102
Step 27: 11102 + 427 = 11529
Step 28: 11529 + 427 = 11956
Step 29: 11956 + 427 = 12383
Step 30: 12383 + 427 = 12810
Step 31: 12810 + 427 = 13237
Step 32: 13237 + 427 = 13664
Step 33: 13664 + 427 = 14091
Step 34: 14091 + 427 = 14518
Step 35: 14518 + 427 = 14945
Step 36: 14945 + 427 = 15372
Step 37: 15372 + 427 = 15799
Step 38: 15799 + 427 = 16226
Step 39: 16226 + 427 = 16653
Step 40: 16653 + 427 = 17080
Step 41: 17080 + 427 = 17507
Step 42: 17507 + 427 = 17934
Step 43: 17934 + 427 = 18361
Step 44: 18361 + 427 = 18788
Step 45: 18788 + 427 = 19215
Step 46: 19215 + 427 = 19642
Step 47: 19642 + 427 = 20069
Step 48: 20069 + 427 = 20496
Step 49: 20496 + 427 = 20923
Step 50: 20923 + 427 = 21350
Step 51: 21350 + 427 = 21777
Step 52: 21777 + 427 = 22204
Step 53: 22204 + 427 = 22631
Step 54: 22631 + 427 = 23058
Step 55: 23058 + 427 = 23485
Step 56: 23485 + 427 = 23912
Step 57: 23912 + 427 = 24339
Step 58: 24339 + 427 = 24766
Step 59: 24766 + 427 = 25193
Step 60: 25193 + 427 = 25620
Step 61: 25620 + 427 = 26047
Step 62: 26047 + 427 = 26474
Step 63: 26474 + 427 = 26901
Step 64: 26901 + 427 = 27328
Step 65: 27328 + 427 = 27755
Step 66: 27755 + 427 = 28182
Step 67: 28182 + 427 = 28609
Step 68: 28609 + 427 = 29036
Step 69: 29036 + 427 = 29463
Step 70: 29463 + 427 = 29890
Step 71: 29890 + 427 = 30317
Step 72: 30317 + 427 = 30744
Step 73: 30744 + 427 = 31171
Step 74: 31171 + 427 = 31598
Step 75: 31598 + 427 = 32025
Step 76: 32025 + 427 = 32452
Step 77: 32452 + 427 = 32879
Step 78: 32879 + 427 = 33306
Step 79: 33306 + 427 = 33733
Step 80: 33733 + 427 = 34160
Step 81: 34160 + 427 = 34587
Step 82: 34587 + 427 = 35014
Step 83: 35014 + 427 = 35441
Step 84: 35441 + 427 = 35868
Step 85: 35868 + 427 = 36295
Step 86: 36295 + 427 = 36722
Step 87: 36722 + 427 = 37149
Step 88: 37149 + 427 = 37576
Step 89: 37576 + 427 = 38003
Step 90: 38003 + 427 = 38430
Step 91: 38430 + 427 = 38857
Step 92: 38857 + 427 = 39284
Step 93: 39284 + 427 = 39711
Step 94: 39711 + 427 = 40138
Step 95: 40138 + 427 = 40565
Step 96: 40565 + 427 = 40992
Step 97: 40992 + 427 = 41419
Step 98: 41419 + 427 = 41846
Step 99: 41846 + 427 = 42273
Step 100: 42273 + 427 = 42700
Step 101: 42700 + 427 = 43127
Step 102: 43127 + 427 = 43554
Step 103: 43554 + 427 = 43981
Step 104: 43981 + 427 = 44408
Step 105: 44408 + 427 = 44835
Step 106: 44835 + 427 = 45262
Step 107: 45262 + 427 = 45689
Step 108: 45689 + 427 = 46116
Step 109: 46116 + 427 = 46543
Step 110: 46543 + 427 = 46970
Step 111: 46970 + 427 = 47397
Step 112: 47397 + 427 = 47824
Step 113: 47824 + 427 = 48251
Step 114: 48251 + 427 = 48678
Step 115: 48678 + 427 = 49105
Step 116: 49105 + 427 = 49532
Step 117: 49532 + 427 = 49959
Step 118: 49959 + 427 = 50386
Step 119: 50386 + 427 = 50813
Step 120: 50813 + 427 = 51240
Step 121: 51240 + 427 = 51667
Step 122: 51667 + 427 = 52094
Step 123: 52094 + 427 = 52521
Step 124: 52521 + 427 = 52948
Step 125: 52948 + 427 = 53375
Step 126: 53375 + 427 = 53802
Step 127: 53802 + 427 = 54229
Step 128: 54229 + 427 = 54656
Step 129: 54656 + 427 = 55083
Step 130: 55083 + 427 = 55510
Step 131: 55510 + 427 = 55937
Step 132: 55937 + 427 = 56364
Step 133: 56364 + 427 = 56791
Step 134: 56791 + 427 = 57218
Step 135: 57218 + 427 = 57645
Step 136: 57645 + 427 = 58072
Step 137: 58072 + 427 = 58499
Step 138: 58499 + 427 = 58926
Step 139: 58926 + 427 = 59353
Step 140: 59353 + 427 = 59780
Step 141: 59780 + 427 = 60207
Step 142: 60207 + 427 = 60634
Step 143: 60634 + 427 = 61061
Step 144: 61061 + 427 = 61488
Step 145: 61488 + 427 = 61915
Step 146: 61915 + 427 = 62342
Step 147: 62342 + 427 = 62769
Step 148: 62769 + 427 = 63196
Step 149: 63196 + 427 = 63623
Step 150: 63623 + 427 = 64050
Step 151: 64050 + 427 = 64477
Step 152: 64477 + 427 = 64904
Step 153: 64904 + 427 = 65331
Step 154: 65331 + 427 = 65758
Step 155: 65758 + 427 = 66185
Step 156: 66185 + 427 = 66612
Step 157: 66612 + 427 = 67039
Step 158: 67039 + 427 = 67466

So, 427*158 = 67466