Alright, let's solve this math problem step by step. First, we have the number 81. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 186. So, we're going to take the number 81 and add it to itself 186 times.
Step 1: 0 + 81 = 81
Step 2: 81 + 81 = 162
Step 3: 162 + 81 = 243
Step 4: 243 + 81 = 324
Step 5: 324 + 81 = 405
Step 6: 405 + 81 = 486
Step 7: 486 + 81 = 567
Step 8: 567 + 81 = 648
Step 9: 648 + 81 = 729
Step 10: 729 + 81 = 810
Step 11: 810 + 81 = 891
Step 12: 891 + 81 = 972
Step 13: 972 + 81 = 1053
Step 14: 1053 + 81 = 1134
Step 15: 1134 + 81 = 1215
Step 16: 1215 + 81 = 1296
Step 17: 1296 + 81 = 1377
Step 18: 1377 + 81 = 1458
Step 19: 1458 + 81 = 1539
Step 20: 1539 + 81 = 1620
Step 21: 1620 + 81 = 1701
Step 22: 1701 + 81 = 1782
Step 23: 1782 + 81 = 1863
Step 24: 1863 + 81 = 1944
Step 25: 1944 + 81 = 2025
Step 26: 2025 + 81 = 2106
Step 27: 2106 + 81 = 2187
Step 28: 2187 + 81 = 2268
Step 29: 2268 + 81 = 2349
Step 30: 2349 + 81 = 2430
Step 31: 2430 + 81 = 2511
Step 32: 2511 + 81 = 2592
Step 33: 2592 + 81 = 2673
Step 34: 2673 + 81 = 2754
Step 35: 2754 + 81 = 2835
Step 36: 2835 + 81 = 2916
Step 37: 2916 + 81 = 2997
Step 38: 2997 + 81 = 3078
Step 39: 3078 + 81 = 3159
Step 40: 3159 + 81 = 3240
Step 41: 3240 + 81 = 3321
Step 42: 3321 + 81 = 3402
Step 43: 3402 + 81 = 3483
Step 44: 3483 + 81 = 3564
Step 45: 3564 + 81 = 3645
Step 46: 3645 + 81 = 3726
Step 47: 3726 + 81 = 3807
Step 48: 3807 + 81 = 3888
Step 49: 3888 + 81 = 3969
Step 50: 3969 + 81 = 4050
Step 51: 4050 + 81 = 4131
Step 52: 4131 + 81 = 4212
Step 53: 4212 + 81 = 4293
Step 54: 4293 + 81 = 4374
Step 55: 4374 + 81 = 4455
Step 56: 4455 + 81 = 4536
Step 57: 4536 + 81 = 4617
Step 58: 4617 + 81 = 4698
Step 59: 4698 + 81 = 4779
Step 60: 4779 + 81 = 4860
Step 61: 4860 + 81 = 4941
Step 62: 4941 + 81 = 5022
Step 63: 5022 + 81 = 5103
Step 64: 5103 + 81 = 5184
Step 65: 5184 + 81 = 5265
Step 66: 5265 + 81 = 5346
Step 67: 5346 + 81 = 5427
Step 68: 5427 + 81 = 5508
Step 69: 5508 + 81 = 5589
Step 70: 5589 + 81 = 5670
Step 71: 5670 + 81 = 5751
Step 72: 5751 + 81 = 5832
Step 73: 5832 + 81 = 5913
Step 74: 5913 + 81 = 5994
Step 75: 5994 + 81 = 6075
Step 76: 6075 + 81 = 6156
Step 77: 6156 + 81 = 6237
Step 78: 6237 + 81 = 6318
Step 79: 6318 + 81 = 6399
Step 80: 6399 + 81 = 6480
Step 81: 6480 + 81 = 6561
Step 82: 6561 + 81 = 6642
Step 83: 6642 + 81 = 6723
Step 84: 6723 + 81 = 6804
Step 85: 6804 + 81 = 6885
Step 86: 6885 + 81 = 6966
Step 87: 6966 + 81 = 7047
Step 88: 7047 + 81 = 7128
Step 89: 7128 + 81 = 7209
Step 90: 7209 + 81 = 7290
Step 91: 7290 + 81 = 7371
Step 92: 7371 + 81 = 7452
Step 93: 7452 + 81 = 7533
Step 94: 7533 + 81 = 7614
Step 95: 7614 + 81 = 7695
Step 96: 7695 + 81 = 7776
Step 97: 7776 + 81 = 7857
Step 98: 7857 + 81 = 7938
Step 99: 7938 + 81 = 8019
Step 100: 8019 + 81 = 8100
Step 101: 8100 + 81 = 8181
Step 102: 8181 + 81 = 8262
Step 103: 8262 + 81 = 8343
Step 104: 8343 + 81 = 8424
Step 105: 8424 + 81 = 8505
Step 106: 8505 + 81 = 8586
Step 107: 8586 + 81 = 8667
Step 108: 8667 + 81 = 8748
Step 109: 8748 + 81 = 8829
Step 110: 8829 + 81 = 8910
Step 111: 8910 + 81 = 8991
Step 112: 8991 + 81 = 9072
Step 113: 9072 + 81 = 9153
Step 114: 9153 + 81 = 9234
Step 115: 9234 + 81 = 9315
Step 116: 9315 + 81 = 9396
Step 117: 9396 + 81 = 9477
Step 118: 9477 + 81 = 9558
Step 119: 9558 + 81 = 9639
Step 120: 9639 + 81 = 9720
Step 121: 9720 + 81 = 9801
Step 122: 9801 + 81 = 9882
Step 123: 9882 + 81 = 9963
Step 124: 9963 + 81 = 10044
Step 125: 10044 + 81 = 10125
Step 126: 10125 + 81 = 10206
Step 127: 10206 + 81 = 10287
Step 128: 10287 + 81 = 10368
Step 129: 10368 + 81 = 10449
Step 130: 10449 + 81 = 10530
Step 131: 10530 + 81 = 10611
Step 132: 10611 + 81 = 10692
Step 133: 10692 + 81 = 10773
Step 134: 10773 + 81 = 10854
Step 135: 10854 + 81 = 10935
Step 136: 10935 + 81 = 11016
Step 137: 11016 + 81 = 11097
Step 138: 11097 + 81 = 11178
Step 139: 11178 + 81 = 11259
Step 140: 11259 + 81 = 11340
Step 141: 11340 + 81 = 11421
Step 142: 11421 + 81 = 11502
Step 143: 11502 + 81 = 11583
Step 144: 11583 + 81 = 11664
Step 145: 11664 + 81 = 11745
Step 146: 11745 + 81 = 11826
Step 147: 11826 + 81 = 11907
Step 148: 11907 + 81 = 11988
Step 149: 11988 + 81 = 12069
Step 150: 12069 + 81 = 12150
Step 151: 12150 + 81 = 12231
Step 152: 12231 + 81 = 12312
Step 153: 12312 + 81 = 12393
Step 154: 12393 + 81 = 12474
Step 155: 12474 + 81 = 12555
Step 156: 12555 + 81 = 12636
Step 157: 12636 + 81 = 12717
Step 158: 12717 + 81 = 12798
Step 159: 12798 + 81 = 12879
Step 160: 12879 + 81 = 12960
Step 161: 12960 + 81 = 13041
Step 162: 13041 + 81 = 13122
Step 163: 13122 + 81 = 13203
Step 164: 13203 + 81 = 13284
Step 165: 13284 + 81 = 13365
Step 166: 13365 + 81 = 13446
Step 167: 13446 + 81 = 13527
Step 168: 13527 + 81 = 13608
Step 169: 13608 + 81 = 13689
Step 170: 13689 + 81 = 13770
Step 171: 13770 + 81 = 13851
Step 172: 13851 + 81 = 13932
Step 173: 13932 + 81 = 14013
Step 174: 14013 + 81 = 14094
Step 175: 14094 + 81 = 14175
Step 176: 14175 + 81 = 14256
Step 177: 14256 + 81 = 14337
Step 178: 14337 + 81 = 14418
Step 179: 14418 + 81 = 14499
Step 180: 14499 + 81 = 14580
Step 181: 14580 + 81 = 14661
Step 182: 14661 + 81 = 14742
Step 183: 14742 + 81 = 14823
Step 184: 14823 + 81 = 14904
Step 185: 14904 + 81 = 14985
Step 186: 14985 + 81 = 15066

So, 81*186 = 15066