Without delay, let's solve this. We've got 635 and we will be multiplying it by 86, that is, adding 635 to itself 86 times.
Step 1: 0 + 635 = 635
Step 2: 635 + 635 = 1270
Step 3: 1270 + 635 = 1905
Step 4: 1905 + 635 = 2540
Step 5: 2540 + 635 = 3175
Step 6: 3175 + 635 = 3810
Step 7: 3810 + 635 = 4445
Step 8: 4445 + 635 = 5080
Step 9: 5080 + 635 = 5715
Step 10: 5715 + 635 = 6350
Step 11: 6350 + 635 = 6985
Step 12: 6985 + 635 = 7620
Step 13: 7620 + 635 = 8255
Step 14: 8255 + 635 = 8890
Step 15: 8890 + 635 = 9525
Step 16: 9525 + 635 = 10160
Step 17: 10160 + 635 = 10795
Step 18: 10795 + 635 = 11430
Step 19: 11430 + 635 = 12065
Step 20: 12065 + 635 = 12700
Step 21: 12700 + 635 = 13335
Step 22: 13335 + 635 = 13970
Step 23: 13970 + 635 = 14605
Step 24: 14605 + 635 = 15240
Step 25: 15240 + 635 = 15875
Step 26: 15875 + 635 = 16510
Step 27: 16510 + 635 = 17145
Step 28: 17145 + 635 = 17780
Step 29: 17780 + 635 = 18415
Step 30: 18415 + 635 = 19050
Step 31: 19050 + 635 = 19685
Step 32: 19685 + 635 = 20320
Step 33: 20320 + 635 = 20955
Step 34: 20955 + 635 = 21590
Step 35: 21590 + 635 = 22225
Step 36: 22225 + 635 = 22860
Step 37: 22860 + 635 = 23495
Step 38: 23495 + 635 = 24130
Step 39: 24130 + 635 = 24765
Step 40: 24765 + 635 = 25400
Step 41: 25400 + 635 = 26035
Step 42: 26035 + 635 = 26670
Step 43: 26670 + 635 = 27305
Step 44: 27305 + 635 = 27940
Step 45: 27940 + 635 = 28575
Step 46: 28575 + 635 = 29210
Step 47: 29210 + 635 = 29845
Step 48: 29845 + 635 = 30480
Step 49: 30480 + 635 = 31115
Step 50: 31115 + 635 = 31750
Step 51: 31750 + 635 = 32385
Step 52: 32385 + 635 = 33020
Step 53: 33020 + 635 = 33655
Step 54: 33655 + 635 = 34290
Step 55: 34290 + 635 = 34925
Step 56: 34925 + 635 = 35560
Step 57: 35560 + 635 = 36195
Step 58: 36195 + 635 = 36830
Step 59: 36830 + 635 = 37465
Step 60: 37465 + 635 = 38100
Step 61: 38100 + 635 = 38735
Step 62: 38735 + 635 = 39370
Step 63: 39370 + 635 = 40005
Step 64: 40005 + 635 = 40640
Step 65: 40640 + 635 = 41275
Step 66: 41275 + 635 = 41910
Step 67: 41910 + 635 = 42545
Step 68: 42545 + 635 = 43180
Step 69: 43180 + 635 = 43815
Step 70: 43815 + 635 = 44450
Step 71: 44450 + 635 = 45085
Step 72: 45085 + 635 = 45720
Step 73: 45720 + 635 = 46355
Step 74: 46355 + 635 = 46990
Step 75: 46990 + 635 = 47625
Step 76: 47625 + 635 = 48260
Step 77: 48260 + 635 = 48895
Step 78: 48895 + 635 = 49530
Step 79: 49530 + 635 = 50165
Step 80: 50165 + 635 = 50800
Step 81: 50800 + 635 = 51435
Step 82: 51435 + 635 = 52070
Step 83: 52070 + 635 = 52705
Step 84: 52705 + 635 = 53340
Step 85: 53340 + 635 = 53975
Step 86: 53975 + 635 = 54610

So, 635*86 = 54610