Alright, let's solve this math problem step by step. First, we have the number 428. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 187. So, we're going to take the number 428 and add it to itself 187 times.
Step 1: 0 + 428 = 428
Step 2: 428 + 428 = 856
Step 3: 856 + 428 = 1284
Step 4: 1284 + 428 = 1712
Step 5: 1712 + 428 = 2140
Step 6: 2140 + 428 = 2568
Step 7: 2568 + 428 = 2996
Step 8: 2996 + 428 = 3424
Step 9: 3424 + 428 = 3852
Step 10: 3852 + 428 = 4280
Step 11: 4280 + 428 = 4708
Step 12: 4708 + 428 = 5136
Step 13: 5136 + 428 = 5564
Step 14: 5564 + 428 = 5992
Step 15: 5992 + 428 = 6420
Step 16: 6420 + 428 = 6848
Step 17: 6848 + 428 = 7276
Step 18: 7276 + 428 = 7704
Step 19: 7704 + 428 = 8132
Step 20: 8132 + 428 = 8560
Step 21: 8560 + 428 = 8988
Step 22: 8988 + 428 = 9416
Step 23: 9416 + 428 = 9844
Step 24: 9844 + 428 = 10272
Step 25: 10272 + 428 = 10700
Step 26: 10700 + 428 = 11128
Step 27: 11128 + 428 = 11556
Step 28: 11556 + 428 = 11984
Step 29: 11984 + 428 = 12412
Step 30: 12412 + 428 = 12840
Step 31: 12840 + 428 = 13268
Step 32: 13268 + 428 = 13696
Step 33: 13696 + 428 = 14124
Step 34: 14124 + 428 = 14552
Step 35: 14552 + 428 = 14980
Step 36: 14980 + 428 = 15408
Step 37: 15408 + 428 = 15836
Step 38: 15836 + 428 = 16264
Step 39: 16264 + 428 = 16692
Step 40: 16692 + 428 = 17120
Step 41: 17120 + 428 = 17548
Step 42: 17548 + 428 = 17976
Step 43: 17976 + 428 = 18404
Step 44: 18404 + 428 = 18832
Step 45: 18832 + 428 = 19260
Step 46: 19260 + 428 = 19688
Step 47: 19688 + 428 = 20116
Step 48: 20116 + 428 = 20544
Step 49: 20544 + 428 = 20972
Step 50: 20972 + 428 = 21400
Step 51: 21400 + 428 = 21828
Step 52: 21828 + 428 = 22256
Step 53: 22256 + 428 = 22684
Step 54: 22684 + 428 = 23112
Step 55: 23112 + 428 = 23540
Step 56: 23540 + 428 = 23968
Step 57: 23968 + 428 = 24396
Step 58: 24396 + 428 = 24824
Step 59: 24824 + 428 = 25252
Step 60: 25252 + 428 = 25680
Step 61: 25680 + 428 = 26108
Step 62: 26108 + 428 = 26536
Step 63: 26536 + 428 = 26964
Step 64: 26964 + 428 = 27392
Step 65: 27392 + 428 = 27820
Step 66: 27820 + 428 = 28248
Step 67: 28248 + 428 = 28676
Step 68: 28676 + 428 = 29104
Step 69: 29104 + 428 = 29532
Step 70: 29532 + 428 = 29960
Step 71: 29960 + 428 = 30388
Step 72: 30388 + 428 = 30816
Step 73: 30816 + 428 = 31244
Step 74: 31244 + 428 = 31672
Step 75: 31672 + 428 = 32100
Step 76: 32100 + 428 = 32528
Step 77: 32528 + 428 = 32956
Step 78: 32956 + 428 = 33384
Step 79: 33384 + 428 = 33812
Step 80: 33812 + 428 = 34240
Step 81: 34240 + 428 = 34668
Step 82: 34668 + 428 = 35096
Step 83: 35096 + 428 = 35524
Step 84: 35524 + 428 = 35952
Step 85: 35952 + 428 = 36380
Step 86: 36380 + 428 = 36808
Step 87: 36808 + 428 = 37236
Step 88: 37236 + 428 = 37664
Step 89: 37664 + 428 = 38092
Step 90: 38092 + 428 = 38520
Step 91: 38520 + 428 = 38948
Step 92: 38948 + 428 = 39376
Step 93: 39376 + 428 = 39804
Step 94: 39804 + 428 = 40232
Step 95: 40232 + 428 = 40660
Step 96: 40660 + 428 = 41088
Step 97: 41088 + 428 = 41516
Step 98: 41516 + 428 = 41944
Step 99: 41944 + 428 = 42372
Step 100: 42372 + 428 = 42800
Step 101: 42800 + 428 = 43228
Step 102: 43228 + 428 = 43656
Step 103: 43656 + 428 = 44084
Step 104: 44084 + 428 = 44512
Step 105: 44512 + 428 = 44940
Step 106: 44940 + 428 = 45368
Step 107: 45368 + 428 = 45796
Step 108: 45796 + 428 = 46224
Step 109: 46224 + 428 = 46652
Step 110: 46652 + 428 = 47080
Step 111: 47080 + 428 = 47508
Step 112: 47508 + 428 = 47936
Step 113: 47936 + 428 = 48364
Step 114: 48364 + 428 = 48792
Step 115: 48792 + 428 = 49220
Step 116: 49220 + 428 = 49648
Step 117: 49648 + 428 = 50076
Step 118: 50076 + 428 = 50504
Step 119: 50504 + 428 = 50932
Step 120: 50932 + 428 = 51360
Step 121: 51360 + 428 = 51788
Step 122: 51788 + 428 = 52216
Step 123: 52216 + 428 = 52644
Step 124: 52644 + 428 = 53072
Step 125: 53072 + 428 = 53500
Step 126: 53500 + 428 = 53928
Step 127: 53928 + 428 = 54356
Step 128: 54356 + 428 = 54784
Step 129: 54784 + 428 = 55212
Step 130: 55212 + 428 = 55640
Step 131: 55640 + 428 = 56068
Step 132: 56068 + 428 = 56496
Step 133: 56496 + 428 = 56924
Step 134: 56924 + 428 = 57352
Step 135: 57352 + 428 = 57780
Step 136: 57780 + 428 = 58208
Step 137: 58208 + 428 = 58636
Step 138: 58636 + 428 = 59064
Step 139: 59064 + 428 = 59492
Step 140: 59492 + 428 = 59920
Step 141: 59920 + 428 = 60348
Step 142: 60348 + 428 = 60776
Step 143: 60776 + 428 = 61204
Step 144: 61204 + 428 = 61632
Step 145: 61632 + 428 = 62060
Step 146: 62060 + 428 = 62488
Step 147: 62488 + 428 = 62916
Step 148: 62916 + 428 = 63344
Step 149: 63344 + 428 = 63772
Step 150: 63772 + 428 = 64200
Step 151: 64200 + 428 = 64628
Step 152: 64628 + 428 = 65056
Step 153: 65056 + 428 = 65484
Step 154: 65484 + 428 = 65912
Step 155: 65912 + 428 = 66340
Step 156: 66340 + 428 = 66768
Step 157: 66768 + 428 = 67196
Step 158: 67196 + 428 = 67624
Step 159: 67624 + 428 = 68052
Step 160: 68052 + 428 = 68480
Step 161: 68480 + 428 = 68908
Step 162: 68908 + 428 = 69336
Step 163: 69336 + 428 = 69764
Step 164: 69764 + 428 = 70192
Step 165: 70192 + 428 = 70620
Step 166: 70620 + 428 = 71048
Step 167: 71048 + 428 = 71476
Step 168: 71476 + 428 = 71904
Step 169: 71904 + 428 = 72332
Step 170: 72332 + 428 = 72760
Step 171: 72760 + 428 = 73188
Step 172: 73188 + 428 = 73616
Step 173: 73616 + 428 = 74044
Step 174: 74044 + 428 = 74472
Step 175: 74472 + 428 = 74900
Step 176: 74900 + 428 = 75328
Step 177: 75328 + 428 = 75756
Step 178: 75756 + 428 = 76184
Step 179: 76184 + 428 = 76612
Step 180: 76612 + 428 = 77040
Step 181: 77040 + 428 = 77468
Step 182: 77468 + 428 = 77896
Step 183: 77896 + 428 = 78324
Step 184: 78324 + 428 = 78752
Step 185: 78752 + 428 = 79180
Step 186: 79180 + 428 = 79608
Step 187: 79608 + 428 = 80036

So, 428*187 = 80036