OK, let's work through this together. We're starting with 989 and we're going to multiply it by 141, which means we add 989 to itself 141 times.
Step 1: 0 + 989 = 989
Step 2: 989 + 989 = 1978
Step 3: 1978 + 989 = 2967
Step 4: 2967 + 989 = 3956
Step 5: 3956 + 989 = 4945
Step 6: 4945 + 989 = 5934
Step 7: 5934 + 989 = 6923
Step 8: 6923 + 989 = 7912
Step 9: 7912 + 989 = 8901
Step 10: 8901 + 989 = 9890
Step 11: 9890 + 989 = 10879
Step 12: 10879 + 989 = 11868
Step 13: 11868 + 989 = 12857
Step 14: 12857 + 989 = 13846
Step 15: 13846 + 989 = 14835
Step 16: 14835 + 989 = 15824
Step 17: 15824 + 989 = 16813
Step 18: 16813 + 989 = 17802
Step 19: 17802 + 989 = 18791
Step 20: 18791 + 989 = 19780
Step 21: 19780 + 989 = 20769
Step 22: 20769 + 989 = 21758
Step 23: 21758 + 989 = 22747
Step 24: 22747 + 989 = 23736
Step 25: 23736 + 989 = 24725
Step 26: 24725 + 989 = 25714
Step 27: 25714 + 989 = 26703
Step 28: 26703 + 989 = 27692
Step 29: 27692 + 989 = 28681
Step 30: 28681 + 989 = 29670
Step 31: 29670 + 989 = 30659
Step 32: 30659 + 989 = 31648
Step 33: 31648 + 989 = 32637
Step 34: 32637 + 989 = 33626
Step 35: 33626 + 989 = 34615
Step 36: 34615 + 989 = 35604
Step 37: 35604 + 989 = 36593
Step 38: 36593 + 989 = 37582
Step 39: 37582 + 989 = 38571
Step 40: 38571 + 989 = 39560
Step 41: 39560 + 989 = 40549
Step 42: 40549 + 989 = 41538
Step 43: 41538 + 989 = 42527
Step 44: 42527 + 989 = 43516
Step 45: 43516 + 989 = 44505
Step 46: 44505 + 989 = 45494
Step 47: 45494 + 989 = 46483
Step 48: 46483 + 989 = 47472
Step 49: 47472 + 989 = 48461
Step 50: 48461 + 989 = 49450
Step 51: 49450 + 989 = 50439
Step 52: 50439 + 989 = 51428
Step 53: 51428 + 989 = 52417
Step 54: 52417 + 989 = 53406
Step 55: 53406 + 989 = 54395
Step 56: 54395 + 989 = 55384
Step 57: 55384 + 989 = 56373
Step 58: 56373 + 989 = 57362
Step 59: 57362 + 989 = 58351
Step 60: 58351 + 989 = 59340
Step 61: 59340 + 989 = 60329
Step 62: 60329 + 989 = 61318
Step 63: 61318 + 989 = 62307
Step 64: 62307 + 989 = 63296
Step 65: 63296 + 989 = 64285
Step 66: 64285 + 989 = 65274
Step 67: 65274 + 989 = 66263
Step 68: 66263 + 989 = 67252
Step 69: 67252 + 989 = 68241
Step 70: 68241 + 989 = 69230
Step 71: 69230 + 989 = 70219
Step 72: 70219 + 989 = 71208
Step 73: 71208 + 989 = 72197
Step 74: 72197 + 989 = 73186
Step 75: 73186 + 989 = 74175
Step 76: 74175 + 989 = 75164
Step 77: 75164 + 989 = 76153
Step 78: 76153 + 989 = 77142
Step 79: 77142 + 989 = 78131
Step 80: 78131 + 989 = 79120
Step 81: 79120 + 989 = 80109
Step 82: 80109 + 989 = 81098
Step 83: 81098 + 989 = 82087
Step 84: 82087 + 989 = 83076
Step 85: 83076 + 989 = 84065
Step 86: 84065 + 989 = 85054
Step 87: 85054 + 989 = 86043
Step 88: 86043 + 989 = 87032
Step 89: 87032 + 989 = 88021
Step 90: 88021 + 989 = 89010
Step 91: 89010 + 989 = 89999
Step 92: 89999 + 989 = 90988
Step 93: 90988 + 989 = 91977
Step 94: 91977 + 989 = 92966
Step 95: 92966 + 989 = 93955
Step 96: 93955 + 989 = 94944
Step 97: 94944 + 989 = 95933
Step 98: 95933 + 989 = 96922
Step 99: 96922 + 989 = 97911
Step 100: 97911 + 989 = 98900
Step 101: 98900 + 989 = 99889
Step 102: 99889 + 989 = 100878
Step 103: 100878 + 989 = 101867
Step 104: 101867 + 989 = 102856
Step 105: 102856 + 989 = 103845
Step 106: 103845 + 989 = 104834
Step 107: 104834 + 989 = 105823
Step 108: 105823 + 989 = 106812
Step 109: 106812 + 989 = 107801
Step 110: 107801 + 989 = 108790
Step 111: 108790 + 989 = 109779
Step 112: 109779 + 989 = 110768
Step 113: 110768 + 989 = 111757
Step 114: 111757 + 989 = 112746
Step 115: 112746 + 989 = 113735
Step 116: 113735 + 989 = 114724
Step 117: 114724 + 989 = 115713
Step 118: 115713 + 989 = 116702
Step 119: 116702 + 989 = 117691
Step 120: 117691 + 989 = 118680
Step 121: 118680 + 989 = 119669
Step 122: 119669 + 989 = 120658
Step 123: 120658 + 989 = 121647
Step 124: 121647 + 989 = 122636
Step 125: 122636 + 989 = 123625
Step 126: 123625 + 989 = 124614
Step 127: 124614 + 989 = 125603
Step 128: 125603 + 989 = 126592
Step 129: 126592 + 989 = 127581
Step 130: 127581 + 989 = 128570
Step 131: 128570 + 989 = 129559
Step 132: 129559 + 989 = 130548
Step 133: 130548 + 989 = 131537
Step 134: 131537 + 989 = 132526
Step 135: 132526 + 989 = 133515
Step 136: 133515 + 989 = 134504
Step 137: 134504 + 989 = 135493
Step 138: 135493 + 989 = 136482
Step 139: 136482 + 989 = 137471
Step 140: 137471 + 989 = 138460
Step 141: 138460 + 989 = 139449

So, 989*141 = 139449