OK, let's work through this together. We're starting with 979 and we're going to multiply it by 158, which means we add 979 to itself 158 times.
Step 1: 0 + 979 = 979
Step 2: 979 + 979 = 1958
Step 3: 1958 + 979 = 2937
Step 4: 2937 + 979 = 3916
Step 5: 3916 + 979 = 4895
Step 6: 4895 + 979 = 5874
Step 7: 5874 + 979 = 6853
Step 8: 6853 + 979 = 7832
Step 9: 7832 + 979 = 8811
Step 10: 8811 + 979 = 9790
Step 11: 9790 + 979 = 10769
Step 12: 10769 + 979 = 11748
Step 13: 11748 + 979 = 12727
Step 14: 12727 + 979 = 13706
Step 15: 13706 + 979 = 14685
Step 16: 14685 + 979 = 15664
Step 17: 15664 + 979 = 16643
Step 18: 16643 + 979 = 17622
Step 19: 17622 + 979 = 18601
Step 20: 18601 + 979 = 19580
Step 21: 19580 + 979 = 20559
Step 22: 20559 + 979 = 21538
Step 23: 21538 + 979 = 22517
Step 24: 22517 + 979 = 23496
Step 25: 23496 + 979 = 24475
Step 26: 24475 + 979 = 25454
Step 27: 25454 + 979 = 26433
Step 28: 26433 + 979 = 27412
Step 29: 27412 + 979 = 28391
Step 30: 28391 + 979 = 29370
Step 31: 29370 + 979 = 30349
Step 32: 30349 + 979 = 31328
Step 33: 31328 + 979 = 32307
Step 34: 32307 + 979 = 33286
Step 35: 33286 + 979 = 34265
Step 36: 34265 + 979 = 35244
Step 37: 35244 + 979 = 36223
Step 38: 36223 + 979 = 37202
Step 39: 37202 + 979 = 38181
Step 40: 38181 + 979 = 39160
Step 41: 39160 + 979 = 40139
Step 42: 40139 + 979 = 41118
Step 43: 41118 + 979 = 42097
Step 44: 42097 + 979 = 43076
Step 45: 43076 + 979 = 44055
Step 46: 44055 + 979 = 45034
Step 47: 45034 + 979 = 46013
Step 48: 46013 + 979 = 46992
Step 49: 46992 + 979 = 47971
Step 50: 47971 + 979 = 48950
Step 51: 48950 + 979 = 49929
Step 52: 49929 + 979 = 50908
Step 53: 50908 + 979 = 51887
Step 54: 51887 + 979 = 52866
Step 55: 52866 + 979 = 53845
Step 56: 53845 + 979 = 54824
Step 57: 54824 + 979 = 55803
Step 58: 55803 + 979 = 56782
Step 59: 56782 + 979 = 57761
Step 60: 57761 + 979 = 58740
Step 61: 58740 + 979 = 59719
Step 62: 59719 + 979 = 60698
Step 63: 60698 + 979 = 61677
Step 64: 61677 + 979 = 62656
Step 65: 62656 + 979 = 63635
Step 66: 63635 + 979 = 64614
Step 67: 64614 + 979 = 65593
Step 68: 65593 + 979 = 66572
Step 69: 66572 + 979 = 67551
Step 70: 67551 + 979 = 68530
Step 71: 68530 + 979 = 69509
Step 72: 69509 + 979 = 70488
Step 73: 70488 + 979 = 71467
Step 74: 71467 + 979 = 72446
Step 75: 72446 + 979 = 73425
Step 76: 73425 + 979 = 74404
Step 77: 74404 + 979 = 75383
Step 78: 75383 + 979 = 76362
Step 79: 76362 + 979 = 77341
Step 80: 77341 + 979 = 78320
Step 81: 78320 + 979 = 79299
Step 82: 79299 + 979 = 80278
Step 83: 80278 + 979 = 81257
Step 84: 81257 + 979 = 82236
Step 85: 82236 + 979 = 83215
Step 86: 83215 + 979 = 84194
Step 87: 84194 + 979 = 85173
Step 88: 85173 + 979 = 86152
Step 89: 86152 + 979 = 87131
Step 90: 87131 + 979 = 88110
Step 91: 88110 + 979 = 89089
Step 92: 89089 + 979 = 90068
Step 93: 90068 + 979 = 91047
Step 94: 91047 + 979 = 92026
Step 95: 92026 + 979 = 93005
Step 96: 93005 + 979 = 93984
Step 97: 93984 + 979 = 94963
Step 98: 94963 + 979 = 95942
Step 99: 95942 + 979 = 96921
Step 100: 96921 + 979 = 97900
Step 101: 97900 + 979 = 98879
Step 102: 98879 + 979 = 99858
Step 103: 99858 + 979 = 100837
Step 104: 100837 + 979 = 101816
Step 105: 101816 + 979 = 102795
Step 106: 102795 + 979 = 103774
Step 107: 103774 + 979 = 104753
Step 108: 104753 + 979 = 105732
Step 109: 105732 + 979 = 106711
Step 110: 106711 + 979 = 107690
Step 111: 107690 + 979 = 108669
Step 112: 108669 + 979 = 109648
Step 113: 109648 + 979 = 110627
Step 114: 110627 + 979 = 111606
Step 115: 111606 + 979 = 112585
Step 116: 112585 + 979 = 113564
Step 117: 113564 + 979 = 114543
Step 118: 114543 + 979 = 115522
Step 119: 115522 + 979 = 116501
Step 120: 116501 + 979 = 117480
Step 121: 117480 + 979 = 118459
Step 122: 118459 + 979 = 119438
Step 123: 119438 + 979 = 120417
Step 124: 120417 + 979 = 121396
Step 125: 121396 + 979 = 122375
Step 126: 122375 + 979 = 123354
Step 127: 123354 + 979 = 124333
Step 128: 124333 + 979 = 125312
Step 129: 125312 + 979 = 126291
Step 130: 126291 + 979 = 127270
Step 131: 127270 + 979 = 128249
Step 132: 128249 + 979 = 129228
Step 133: 129228 + 979 = 130207
Step 134: 130207 + 979 = 131186
Step 135: 131186 + 979 = 132165
Step 136: 132165 + 979 = 133144
Step 137: 133144 + 979 = 134123
Step 138: 134123 + 979 = 135102
Step 139: 135102 + 979 = 136081
Step 140: 136081 + 979 = 137060
Step 141: 137060 + 979 = 138039
Step 142: 138039 + 979 = 139018
Step 143: 139018 + 979 = 139997
Step 144: 139997 + 979 = 140976
Step 145: 140976 + 979 = 141955
Step 146: 141955 + 979 = 142934
Step 147: 142934 + 979 = 143913
Step 148: 143913 + 979 = 144892
Step 149: 144892 + 979 = 145871
Step 150: 145871 + 979 = 146850
Step 151: 146850 + 979 = 147829
Step 152: 147829 + 979 = 148808
Step 153: 148808 + 979 = 149787
Step 154: 149787 + 979 = 150766
Step 155: 150766 + 979 = 151745
Step 156: 151745 + 979 = 152724
Step 157: 152724 + 979 = 153703
Step 158: 153703 + 979 = 154682

So, 979*158 = 154682