Alright, let's solve this math problem step by step. First, we have the number 987. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 189. So, we're going to take the number 987 and add it to itself 189 times.
Step 1: 0 + 987 = 987
Step 2: 987 + 987 = 1974
Step 3: 1974 + 987 = 2961
Step 4: 2961 + 987 = 3948
Step 5: 3948 + 987 = 4935
Step 6: 4935 + 987 = 5922
Step 7: 5922 + 987 = 6909
Step 8: 6909 + 987 = 7896
Step 9: 7896 + 987 = 8883
Step 10: 8883 + 987 = 9870
Step 11: 9870 + 987 = 10857
Step 12: 10857 + 987 = 11844
Step 13: 11844 + 987 = 12831
Step 14: 12831 + 987 = 13818
Step 15: 13818 + 987 = 14805
Step 16: 14805 + 987 = 15792
Step 17: 15792 + 987 = 16779
Step 18: 16779 + 987 = 17766
Step 19: 17766 + 987 = 18753
Step 20: 18753 + 987 = 19740
Step 21: 19740 + 987 = 20727
Step 22: 20727 + 987 = 21714
Step 23: 21714 + 987 = 22701
Step 24: 22701 + 987 = 23688
Step 25: 23688 + 987 = 24675
Step 26: 24675 + 987 = 25662
Step 27: 25662 + 987 = 26649
Step 28: 26649 + 987 = 27636
Step 29: 27636 + 987 = 28623
Step 30: 28623 + 987 = 29610
Step 31: 29610 + 987 = 30597
Step 32: 30597 + 987 = 31584
Step 33: 31584 + 987 = 32571
Step 34: 32571 + 987 = 33558
Step 35: 33558 + 987 = 34545
Step 36: 34545 + 987 = 35532
Step 37: 35532 + 987 = 36519
Step 38: 36519 + 987 = 37506
Step 39: 37506 + 987 = 38493
Step 40: 38493 + 987 = 39480
Step 41: 39480 + 987 = 40467
Step 42: 40467 + 987 = 41454
Step 43: 41454 + 987 = 42441
Step 44: 42441 + 987 = 43428
Step 45: 43428 + 987 = 44415
Step 46: 44415 + 987 = 45402
Step 47: 45402 + 987 = 46389
Step 48: 46389 + 987 = 47376
Step 49: 47376 + 987 = 48363
Step 50: 48363 + 987 = 49350
Step 51: 49350 + 987 = 50337
Step 52: 50337 + 987 = 51324
Step 53: 51324 + 987 = 52311
Step 54: 52311 + 987 = 53298
Step 55: 53298 + 987 = 54285
Step 56: 54285 + 987 = 55272
Step 57: 55272 + 987 = 56259
Step 58: 56259 + 987 = 57246
Step 59: 57246 + 987 = 58233
Step 60: 58233 + 987 = 59220
Step 61: 59220 + 987 = 60207
Step 62: 60207 + 987 = 61194
Step 63: 61194 + 987 = 62181
Step 64: 62181 + 987 = 63168
Step 65: 63168 + 987 = 64155
Step 66: 64155 + 987 = 65142
Step 67: 65142 + 987 = 66129
Step 68: 66129 + 987 = 67116
Step 69: 67116 + 987 = 68103
Step 70: 68103 + 987 = 69090
Step 71: 69090 + 987 = 70077
Step 72: 70077 + 987 = 71064
Step 73: 71064 + 987 = 72051
Step 74: 72051 + 987 = 73038
Step 75: 73038 + 987 = 74025
Step 76: 74025 + 987 = 75012
Step 77: 75012 + 987 = 75999
Step 78: 75999 + 987 = 76986
Step 79: 76986 + 987 = 77973
Step 80: 77973 + 987 = 78960
Step 81: 78960 + 987 = 79947
Step 82: 79947 + 987 = 80934
Step 83: 80934 + 987 = 81921
Step 84: 81921 + 987 = 82908
Step 85: 82908 + 987 = 83895
Step 86: 83895 + 987 = 84882
Step 87: 84882 + 987 = 85869
Step 88: 85869 + 987 = 86856
Step 89: 86856 + 987 = 87843
Step 90: 87843 + 987 = 88830
Step 91: 88830 + 987 = 89817
Step 92: 89817 + 987 = 90804
Step 93: 90804 + 987 = 91791
Step 94: 91791 + 987 = 92778
Step 95: 92778 + 987 = 93765
Step 96: 93765 + 987 = 94752
Step 97: 94752 + 987 = 95739
Step 98: 95739 + 987 = 96726
Step 99: 96726 + 987 = 97713
Step 100: 97713 + 987 = 98700
Step 101: 98700 + 987 = 99687
Step 102: 99687 + 987 = 100674
Step 103: 100674 + 987 = 101661
Step 104: 101661 + 987 = 102648
Step 105: 102648 + 987 = 103635
Step 106: 103635 + 987 = 104622
Step 107: 104622 + 987 = 105609
Step 108: 105609 + 987 = 106596
Step 109: 106596 + 987 = 107583
Step 110: 107583 + 987 = 108570
Step 111: 108570 + 987 = 109557
Step 112: 109557 + 987 = 110544
Step 113: 110544 + 987 = 111531
Step 114: 111531 + 987 = 112518
Step 115: 112518 + 987 = 113505
Step 116: 113505 + 987 = 114492
Step 117: 114492 + 987 = 115479
Step 118: 115479 + 987 = 116466
Step 119: 116466 + 987 = 117453
Step 120: 117453 + 987 = 118440
Step 121: 118440 + 987 = 119427
Step 122: 119427 + 987 = 120414
Step 123: 120414 + 987 = 121401
Step 124: 121401 + 987 = 122388
Step 125: 122388 + 987 = 123375
Step 126: 123375 + 987 = 124362
Step 127: 124362 + 987 = 125349
Step 128: 125349 + 987 = 126336
Step 129: 126336 + 987 = 127323
Step 130: 127323 + 987 = 128310
Step 131: 128310 + 987 = 129297
Step 132: 129297 + 987 = 130284
Step 133: 130284 + 987 = 131271
Step 134: 131271 + 987 = 132258
Step 135: 132258 + 987 = 133245
Step 136: 133245 + 987 = 134232
Step 137: 134232 + 987 = 135219
Step 138: 135219 + 987 = 136206
Step 139: 136206 + 987 = 137193
Step 140: 137193 + 987 = 138180
Step 141: 138180 + 987 = 139167
Step 142: 139167 + 987 = 140154
Step 143: 140154 + 987 = 141141
Step 144: 141141 + 987 = 142128
Step 145: 142128 + 987 = 143115
Step 146: 143115 + 987 = 144102
Step 147: 144102 + 987 = 145089
Step 148: 145089 + 987 = 146076
Step 149: 146076 + 987 = 147063
Step 150: 147063 + 987 = 148050
Step 151: 148050 + 987 = 149037
Step 152: 149037 + 987 = 150024
Step 153: 150024 + 987 = 151011
Step 154: 151011 + 987 = 151998
Step 155: 151998 + 987 = 152985
Step 156: 152985 + 987 = 153972
Step 157: 153972 + 987 = 154959
Step 158: 154959 + 987 = 155946
Step 159: 155946 + 987 = 156933
Step 160: 156933 + 987 = 157920
Step 161: 157920 + 987 = 158907
Step 162: 158907 + 987 = 159894
Step 163: 159894 + 987 = 160881
Step 164: 160881 + 987 = 161868
Step 165: 161868 + 987 = 162855
Step 166: 162855 + 987 = 163842
Step 167: 163842 + 987 = 164829
Step 168: 164829 + 987 = 165816
Step 169: 165816 + 987 = 166803
Step 170: 166803 + 987 = 167790
Step 171: 167790 + 987 = 168777
Step 172: 168777 + 987 = 169764
Step 173: 169764 + 987 = 170751
Step 174: 170751 + 987 = 171738
Step 175: 171738 + 987 = 172725
Step 176: 172725 + 987 = 173712
Step 177: 173712 + 987 = 174699
Step 178: 174699 + 987 = 175686
Step 179: 175686 + 987 = 176673
Step 180: 176673 + 987 = 177660
Step 181: 177660 + 987 = 178647
Step 182: 178647 + 987 = 179634
Step 183: 179634 + 987 = 180621
Step 184: 180621 + 987 = 181608
Step 185: 181608 + 987 = 182595
Step 186: 182595 + 987 = 183582
Step 187: 183582 + 987 = 184569
Step 188: 184569 + 987 = 185556
Step 189: 185556 + 987 = 186543

So, 987*189 = 186543