Let's get this math done. We have 881 and we're going to multiply it by 173. This is the same as taking 881 and adding it to itself 173 times.
Step 1: 0 + 881 = 881
Step 2: 881 + 881 = 1762
Step 3: 1762 + 881 = 2643
Step 4: 2643 + 881 = 3524
Step 5: 3524 + 881 = 4405
Step 6: 4405 + 881 = 5286
Step 7: 5286 + 881 = 6167
Step 8: 6167 + 881 = 7048
Step 9: 7048 + 881 = 7929
Step 10: 7929 + 881 = 8810
Step 11: 8810 + 881 = 9691
Step 12: 9691 + 881 = 10572
Step 13: 10572 + 881 = 11453
Step 14: 11453 + 881 = 12334
Step 15: 12334 + 881 = 13215
Step 16: 13215 + 881 = 14096
Step 17: 14096 + 881 = 14977
Step 18: 14977 + 881 = 15858
Step 19: 15858 + 881 = 16739
Step 20: 16739 + 881 = 17620
Step 21: 17620 + 881 = 18501
Step 22: 18501 + 881 = 19382
Step 23: 19382 + 881 = 20263
Step 24: 20263 + 881 = 21144
Step 25: 21144 + 881 = 22025
Step 26: 22025 + 881 = 22906
Step 27: 22906 + 881 = 23787
Step 28: 23787 + 881 = 24668
Step 29: 24668 + 881 = 25549
Step 30: 25549 + 881 = 26430
Step 31: 26430 + 881 = 27311
Step 32: 27311 + 881 = 28192
Step 33: 28192 + 881 = 29073
Step 34: 29073 + 881 = 29954
Step 35: 29954 + 881 = 30835
Step 36: 30835 + 881 = 31716
Step 37: 31716 + 881 = 32597
Step 38: 32597 + 881 = 33478
Step 39: 33478 + 881 = 34359
Step 40: 34359 + 881 = 35240
Step 41: 35240 + 881 = 36121
Step 42: 36121 + 881 = 37002
Step 43: 37002 + 881 = 37883
Step 44: 37883 + 881 = 38764
Step 45: 38764 + 881 = 39645
Step 46: 39645 + 881 = 40526
Step 47: 40526 + 881 = 41407
Step 48: 41407 + 881 = 42288
Step 49: 42288 + 881 = 43169
Step 50: 43169 + 881 = 44050
Step 51: 44050 + 881 = 44931
Step 52: 44931 + 881 = 45812
Step 53: 45812 + 881 = 46693
Step 54: 46693 + 881 = 47574
Step 55: 47574 + 881 = 48455
Step 56: 48455 + 881 = 49336
Step 57: 49336 + 881 = 50217
Step 58: 50217 + 881 = 51098
Step 59: 51098 + 881 = 51979
Step 60: 51979 + 881 = 52860
Step 61: 52860 + 881 = 53741
Step 62: 53741 + 881 = 54622
Step 63: 54622 + 881 = 55503
Step 64: 55503 + 881 = 56384
Step 65: 56384 + 881 = 57265
Step 66: 57265 + 881 = 58146
Step 67: 58146 + 881 = 59027
Step 68: 59027 + 881 = 59908
Step 69: 59908 + 881 = 60789
Step 70: 60789 + 881 = 61670
Step 71: 61670 + 881 = 62551
Step 72: 62551 + 881 = 63432
Step 73: 63432 + 881 = 64313
Step 74: 64313 + 881 = 65194
Step 75: 65194 + 881 = 66075
Step 76: 66075 + 881 = 66956
Step 77: 66956 + 881 = 67837
Step 78: 67837 + 881 = 68718
Step 79: 68718 + 881 = 69599
Step 80: 69599 + 881 = 70480
Step 81: 70480 + 881 = 71361
Step 82: 71361 + 881 = 72242
Step 83: 72242 + 881 = 73123
Step 84: 73123 + 881 = 74004
Step 85: 74004 + 881 = 74885
Step 86: 74885 + 881 = 75766
Step 87: 75766 + 881 = 76647
Step 88: 76647 + 881 = 77528
Step 89: 77528 + 881 = 78409
Step 90: 78409 + 881 = 79290
Step 91: 79290 + 881 = 80171
Step 92: 80171 + 881 = 81052
Step 93: 81052 + 881 = 81933
Step 94: 81933 + 881 = 82814
Step 95: 82814 + 881 = 83695
Step 96: 83695 + 881 = 84576
Step 97: 84576 + 881 = 85457
Step 98: 85457 + 881 = 86338
Step 99: 86338 + 881 = 87219
Step 100: 87219 + 881 = 88100
Step 101: 88100 + 881 = 88981
Step 102: 88981 + 881 = 89862
Step 103: 89862 + 881 = 90743
Step 104: 90743 + 881 = 91624
Step 105: 91624 + 881 = 92505
Step 106: 92505 + 881 = 93386
Step 107: 93386 + 881 = 94267
Step 108: 94267 + 881 = 95148
Step 109: 95148 + 881 = 96029
Step 110: 96029 + 881 = 96910
Step 111: 96910 + 881 = 97791
Step 112: 97791 + 881 = 98672
Step 113: 98672 + 881 = 99553
Step 114: 99553 + 881 = 100434
Step 115: 100434 + 881 = 101315
Step 116: 101315 + 881 = 102196
Step 117: 102196 + 881 = 103077
Step 118: 103077 + 881 = 103958
Step 119: 103958 + 881 = 104839
Step 120: 104839 + 881 = 105720
Step 121: 105720 + 881 = 106601
Step 122: 106601 + 881 = 107482
Step 123: 107482 + 881 = 108363
Step 124: 108363 + 881 = 109244
Step 125: 109244 + 881 = 110125
Step 126: 110125 + 881 = 111006
Step 127: 111006 + 881 = 111887
Step 128: 111887 + 881 = 112768
Step 129: 112768 + 881 = 113649
Step 130: 113649 + 881 = 114530
Step 131: 114530 + 881 = 115411
Step 132: 115411 + 881 = 116292
Step 133: 116292 + 881 = 117173
Step 134: 117173 + 881 = 118054
Step 135: 118054 + 881 = 118935
Step 136: 118935 + 881 = 119816
Step 137: 119816 + 881 = 120697
Step 138: 120697 + 881 = 121578
Step 139: 121578 + 881 = 122459
Step 140: 122459 + 881 = 123340
Step 141: 123340 + 881 = 124221
Step 142: 124221 + 881 = 125102
Step 143: 125102 + 881 = 125983
Step 144: 125983 + 881 = 126864
Step 145: 126864 + 881 = 127745
Step 146: 127745 + 881 = 128626
Step 147: 128626 + 881 = 129507
Step 148: 129507 + 881 = 130388
Step 149: 130388 + 881 = 131269
Step 150: 131269 + 881 = 132150
Step 151: 132150 + 881 = 133031
Step 152: 133031 + 881 = 133912
Step 153: 133912 + 881 = 134793
Step 154: 134793 + 881 = 135674
Step 155: 135674 + 881 = 136555
Step 156: 136555 + 881 = 137436
Step 157: 137436 + 881 = 138317
Step 158: 138317 + 881 = 139198
Step 159: 139198 + 881 = 140079
Step 160: 140079 + 881 = 140960
Step 161: 140960 + 881 = 141841
Step 162: 141841 + 881 = 142722
Step 163: 142722 + 881 = 143603
Step 164: 143603 + 881 = 144484
Step 165: 144484 + 881 = 145365
Step 166: 145365 + 881 = 146246
Step 167: 146246 + 881 = 147127
Step 168: 147127 + 881 = 148008
Step 169: 148008 + 881 = 148889
Step 170: 148889 + 881 = 149770
Step 171: 149770 + 881 = 150651
Step 172: 150651 + 881 = 151532
Step 173: 151532 + 881 = 152413

So, 881*173 = 152413