Sure thing, let's get straight to it. We start with 545 and we're going to multiply it by 86, which means adding 545 to itself 86 times.
Step 1: 0 + 545 = 545
Step 2: 545 + 545 = 1090
Step 3: 1090 + 545 = 1635
Step 4: 1635 + 545 = 2180
Step 5: 2180 + 545 = 2725
Step 6: 2725 + 545 = 3270
Step 7: 3270 + 545 = 3815
Step 8: 3815 + 545 = 4360
Step 9: 4360 + 545 = 4905
Step 10: 4905 + 545 = 5450
Step 11: 5450 + 545 = 5995
Step 12: 5995 + 545 = 6540
Step 13: 6540 + 545 = 7085
Step 14: 7085 + 545 = 7630
Step 15: 7630 + 545 = 8175
Step 16: 8175 + 545 = 8720
Step 17: 8720 + 545 = 9265
Step 18: 9265 + 545 = 9810
Step 19: 9810 + 545 = 10355
Step 20: 10355 + 545 = 10900
Step 21: 10900 + 545 = 11445
Step 22: 11445 + 545 = 11990
Step 23: 11990 + 545 = 12535
Step 24: 12535 + 545 = 13080
Step 25: 13080 + 545 = 13625
Step 26: 13625 + 545 = 14170
Step 27: 14170 + 545 = 14715
Step 28: 14715 + 545 = 15260
Step 29: 15260 + 545 = 15805
Step 30: 15805 + 545 = 16350
Step 31: 16350 + 545 = 16895
Step 32: 16895 + 545 = 17440
Step 33: 17440 + 545 = 17985
Step 34: 17985 + 545 = 18530
Step 35: 18530 + 545 = 19075
Step 36: 19075 + 545 = 19620
Step 37: 19620 + 545 = 20165
Step 38: 20165 + 545 = 20710
Step 39: 20710 + 545 = 21255
Step 40: 21255 + 545 = 21800
Step 41: 21800 + 545 = 22345
Step 42: 22345 + 545 = 22890
Step 43: 22890 + 545 = 23435
Step 44: 23435 + 545 = 23980
Step 45: 23980 + 545 = 24525
Step 46: 24525 + 545 = 25070
Step 47: 25070 + 545 = 25615
Step 48: 25615 + 545 = 26160
Step 49: 26160 + 545 = 26705
Step 50: 26705 + 545 = 27250
Step 51: 27250 + 545 = 27795
Step 52: 27795 + 545 = 28340
Step 53: 28340 + 545 = 28885
Step 54: 28885 + 545 = 29430
Step 55: 29430 + 545 = 29975
Step 56: 29975 + 545 = 30520
Step 57: 30520 + 545 = 31065
Step 58: 31065 + 545 = 31610
Step 59: 31610 + 545 = 32155
Step 60: 32155 + 545 = 32700
Step 61: 32700 + 545 = 33245
Step 62: 33245 + 545 = 33790
Step 63: 33790 + 545 = 34335
Step 64: 34335 + 545 = 34880
Step 65: 34880 + 545 = 35425
Step 66: 35425 + 545 = 35970
Step 67: 35970 + 545 = 36515
Step 68: 36515 + 545 = 37060
Step 69: 37060 + 545 = 37605
Step 70: 37605 + 545 = 38150
Step 71: 38150 + 545 = 38695
Step 72: 38695 + 545 = 39240
Step 73: 39240 + 545 = 39785
Step 74: 39785 + 545 = 40330
Step 75: 40330 + 545 = 40875
Step 76: 40875 + 545 = 41420
Step 77: 41420 + 545 = 41965
Step 78: 41965 + 545 = 42510
Step 79: 42510 + 545 = 43055
Step 80: 43055 + 545 = 43600
Step 81: 43600 + 545 = 44145
Step 82: 44145 + 545 = 44690
Step 83: 44690 + 545 = 45235
Step 84: 45235 + 545 = 45780
Step 85: 45780 + 545 = 46325
Step 86: 46325 + 545 = 46870

So, 545*86 = 46870