Alright, let's solve this math problem step by step. First, we have the number 455. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 87. So, we're going to take the number 455 and add it to itself 87 times.
Step 1: 0 + 455 = 455
Step 2: 455 + 455 = 910
Step 3: 910 + 455 = 1365
Step 4: 1365 + 455 = 1820
Step 5: 1820 + 455 = 2275
Step 6: 2275 + 455 = 2730
Step 7: 2730 + 455 = 3185
Step 8: 3185 + 455 = 3640
Step 9: 3640 + 455 = 4095
Step 10: 4095 + 455 = 4550
Step 11: 4550 + 455 = 5005
Step 12: 5005 + 455 = 5460
Step 13: 5460 + 455 = 5915
Step 14: 5915 + 455 = 6370
Step 15: 6370 + 455 = 6825
Step 16: 6825 + 455 = 7280
Step 17: 7280 + 455 = 7735
Step 18: 7735 + 455 = 8190
Step 19: 8190 + 455 = 8645
Step 20: 8645 + 455 = 9100
Step 21: 9100 + 455 = 9555
Step 22: 9555 + 455 = 10010
Step 23: 10010 + 455 = 10465
Step 24: 10465 + 455 = 10920
Step 25: 10920 + 455 = 11375
Step 26: 11375 + 455 = 11830
Step 27: 11830 + 455 = 12285
Step 28: 12285 + 455 = 12740
Step 29: 12740 + 455 = 13195
Step 30: 13195 + 455 = 13650
Step 31: 13650 + 455 = 14105
Step 32: 14105 + 455 = 14560
Step 33: 14560 + 455 = 15015
Step 34: 15015 + 455 = 15470
Step 35: 15470 + 455 = 15925
Step 36: 15925 + 455 = 16380
Step 37: 16380 + 455 = 16835
Step 38: 16835 + 455 = 17290
Step 39: 17290 + 455 = 17745
Step 40: 17745 + 455 = 18200
Step 41: 18200 + 455 = 18655
Step 42: 18655 + 455 = 19110
Step 43: 19110 + 455 = 19565
Step 44: 19565 + 455 = 20020
Step 45: 20020 + 455 = 20475
Step 46: 20475 + 455 = 20930
Step 47: 20930 + 455 = 21385
Step 48: 21385 + 455 = 21840
Step 49: 21840 + 455 = 22295
Step 50: 22295 + 455 = 22750
Step 51: 22750 + 455 = 23205
Step 52: 23205 + 455 = 23660
Step 53: 23660 + 455 = 24115
Step 54: 24115 + 455 = 24570
Step 55: 24570 + 455 = 25025
Step 56: 25025 + 455 = 25480
Step 57: 25480 + 455 = 25935
Step 58: 25935 + 455 = 26390
Step 59: 26390 + 455 = 26845
Step 60: 26845 + 455 = 27300
Step 61: 27300 + 455 = 27755
Step 62: 27755 + 455 = 28210
Step 63: 28210 + 455 = 28665
Step 64: 28665 + 455 = 29120
Step 65: 29120 + 455 = 29575
Step 66: 29575 + 455 = 30030
Step 67: 30030 + 455 = 30485
Step 68: 30485 + 455 = 30940
Step 69: 30940 + 455 = 31395
Step 70: 31395 + 455 = 31850
Step 71: 31850 + 455 = 32305
Step 72: 32305 + 455 = 32760
Step 73: 32760 + 455 = 33215
Step 74: 33215 + 455 = 33670
Step 75: 33670 + 455 = 34125
Step 76: 34125 + 455 = 34580
Step 77: 34580 + 455 = 35035
Step 78: 35035 + 455 = 35490
Step 79: 35490 + 455 = 35945
Step 80: 35945 + 455 = 36400
Step 81: 36400 + 455 = 36855
Step 82: 36855 + 455 = 37310
Step 83: 37310 + 455 = 37765
Step 84: 37765 + 455 = 38220
Step 85: 38220 + 455 = 38675
Step 86: 38675 + 455 = 39130
Step 87: 39130 + 455 = 39585

So, 455*87 = 39585