Alright, let's solve this math problem step by step. First, we have the number 891. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 148. So, we're going to take the number 891 and add it to itself 148 times.
Step 1: 0 + 891 = 891
Step 2: 891 + 891 = 1782
Step 3: 1782 + 891 = 2673
Step 4: 2673 + 891 = 3564
Step 5: 3564 + 891 = 4455
Step 6: 4455 + 891 = 5346
Step 7: 5346 + 891 = 6237
Step 8: 6237 + 891 = 7128
Step 9: 7128 + 891 = 8019
Step 10: 8019 + 891 = 8910
Step 11: 8910 + 891 = 9801
Step 12: 9801 + 891 = 10692
Step 13: 10692 + 891 = 11583
Step 14: 11583 + 891 = 12474
Step 15: 12474 + 891 = 13365
Step 16: 13365 + 891 = 14256
Step 17: 14256 + 891 = 15147
Step 18: 15147 + 891 = 16038
Step 19: 16038 + 891 = 16929
Step 20: 16929 + 891 = 17820
Step 21: 17820 + 891 = 18711
Step 22: 18711 + 891 = 19602
Step 23: 19602 + 891 = 20493
Step 24: 20493 + 891 = 21384
Step 25: 21384 + 891 = 22275
Step 26: 22275 + 891 = 23166
Step 27: 23166 + 891 = 24057
Step 28: 24057 + 891 = 24948
Step 29: 24948 + 891 = 25839
Step 30: 25839 + 891 = 26730
Step 31: 26730 + 891 = 27621
Step 32: 27621 + 891 = 28512
Step 33: 28512 + 891 = 29403
Step 34: 29403 + 891 = 30294
Step 35: 30294 + 891 = 31185
Step 36: 31185 + 891 = 32076
Step 37: 32076 + 891 = 32967
Step 38: 32967 + 891 = 33858
Step 39: 33858 + 891 = 34749
Step 40: 34749 + 891 = 35640
Step 41: 35640 + 891 = 36531
Step 42: 36531 + 891 = 37422
Step 43: 37422 + 891 = 38313
Step 44: 38313 + 891 = 39204
Step 45: 39204 + 891 = 40095
Step 46: 40095 + 891 = 40986
Step 47: 40986 + 891 = 41877
Step 48: 41877 + 891 = 42768
Step 49: 42768 + 891 = 43659
Step 50: 43659 + 891 = 44550
Step 51: 44550 + 891 = 45441
Step 52: 45441 + 891 = 46332
Step 53: 46332 + 891 = 47223
Step 54: 47223 + 891 = 48114
Step 55: 48114 + 891 = 49005
Step 56: 49005 + 891 = 49896
Step 57: 49896 + 891 = 50787
Step 58: 50787 + 891 = 51678
Step 59: 51678 + 891 = 52569
Step 60: 52569 + 891 = 53460
Step 61: 53460 + 891 = 54351
Step 62: 54351 + 891 = 55242
Step 63: 55242 + 891 = 56133
Step 64: 56133 + 891 = 57024
Step 65: 57024 + 891 = 57915
Step 66: 57915 + 891 = 58806
Step 67: 58806 + 891 = 59697
Step 68: 59697 + 891 = 60588
Step 69: 60588 + 891 = 61479
Step 70: 61479 + 891 = 62370
Step 71: 62370 + 891 = 63261
Step 72: 63261 + 891 = 64152
Step 73: 64152 + 891 = 65043
Step 74: 65043 + 891 = 65934
Step 75: 65934 + 891 = 66825
Step 76: 66825 + 891 = 67716
Step 77: 67716 + 891 = 68607
Step 78: 68607 + 891 = 69498
Step 79: 69498 + 891 = 70389
Step 80: 70389 + 891 = 71280
Step 81: 71280 + 891 = 72171
Step 82: 72171 + 891 = 73062
Step 83: 73062 + 891 = 73953
Step 84: 73953 + 891 = 74844
Step 85: 74844 + 891 = 75735
Step 86: 75735 + 891 = 76626
Step 87: 76626 + 891 = 77517
Step 88: 77517 + 891 = 78408
Step 89: 78408 + 891 = 79299
Step 90: 79299 + 891 = 80190
Step 91: 80190 + 891 = 81081
Step 92: 81081 + 891 = 81972
Step 93: 81972 + 891 = 82863
Step 94: 82863 + 891 = 83754
Step 95: 83754 + 891 = 84645
Step 96: 84645 + 891 = 85536
Step 97: 85536 + 891 = 86427
Step 98: 86427 + 891 = 87318
Step 99: 87318 + 891 = 88209
Step 100: 88209 + 891 = 89100
Step 101: 89100 + 891 = 89991
Step 102: 89991 + 891 = 90882
Step 103: 90882 + 891 = 91773
Step 104: 91773 + 891 = 92664
Step 105: 92664 + 891 = 93555
Step 106: 93555 + 891 = 94446
Step 107: 94446 + 891 = 95337
Step 108: 95337 + 891 = 96228
Step 109: 96228 + 891 = 97119
Step 110: 97119 + 891 = 98010
Step 111: 98010 + 891 = 98901
Step 112: 98901 + 891 = 99792
Step 113: 99792 + 891 = 100683
Step 114: 100683 + 891 = 101574
Step 115: 101574 + 891 = 102465
Step 116: 102465 + 891 = 103356
Step 117: 103356 + 891 = 104247
Step 118: 104247 + 891 = 105138
Step 119: 105138 + 891 = 106029
Step 120: 106029 + 891 = 106920
Step 121: 106920 + 891 = 107811
Step 122: 107811 + 891 = 108702
Step 123: 108702 + 891 = 109593
Step 124: 109593 + 891 = 110484
Step 125: 110484 + 891 = 111375
Step 126: 111375 + 891 = 112266
Step 127: 112266 + 891 = 113157
Step 128: 113157 + 891 = 114048
Step 129: 114048 + 891 = 114939
Step 130: 114939 + 891 = 115830
Step 131: 115830 + 891 = 116721
Step 132: 116721 + 891 = 117612
Step 133: 117612 + 891 = 118503
Step 134: 118503 + 891 = 119394
Step 135: 119394 + 891 = 120285
Step 136: 120285 + 891 = 121176
Step 137: 121176 + 891 = 122067
Step 138: 122067 + 891 = 122958
Step 139: 122958 + 891 = 123849
Step 140: 123849 + 891 = 124740
Step 141: 124740 + 891 = 125631
Step 142: 125631 + 891 = 126522
Step 143: 126522 + 891 = 127413
Step 144: 127413 + 891 = 128304
Step 145: 128304 + 891 = 129195
Step 146: 129195 + 891 = 130086
Step 147: 130086 + 891 = 130977
Step 148: 130977 + 891 = 131868

So, 891*148 = 131868