Sure thing! We've got 413 and we're gonna multiply it by 86. That's the same as adding 413 to itself 86 times.
Step 1: 0 + 413 = 413
Step 2: 413 + 413 = 826
Step 3: 826 + 413 = 1239
Step 4: 1239 + 413 = 1652
Step 5: 1652 + 413 = 2065
Step 6: 2065 + 413 = 2478
Step 7: 2478 + 413 = 2891
Step 8: 2891 + 413 = 3304
Step 9: 3304 + 413 = 3717
Step 10: 3717 + 413 = 4130
Step 11: 4130 + 413 = 4543
Step 12: 4543 + 413 = 4956
Step 13: 4956 + 413 = 5369
Step 14: 5369 + 413 = 5782
Step 15: 5782 + 413 = 6195
Step 16: 6195 + 413 = 6608
Step 17: 6608 + 413 = 7021
Step 18: 7021 + 413 = 7434
Step 19: 7434 + 413 = 7847
Step 20: 7847 + 413 = 8260
Step 21: 8260 + 413 = 8673
Step 22: 8673 + 413 = 9086
Step 23: 9086 + 413 = 9499
Step 24: 9499 + 413 = 9912
Step 25: 9912 + 413 = 10325
Step 26: 10325 + 413 = 10738
Step 27: 10738 + 413 = 11151
Step 28: 11151 + 413 = 11564
Step 29: 11564 + 413 = 11977
Step 30: 11977 + 413 = 12390
Step 31: 12390 + 413 = 12803
Step 32: 12803 + 413 = 13216
Step 33: 13216 + 413 = 13629
Step 34: 13629 + 413 = 14042
Step 35: 14042 + 413 = 14455
Step 36: 14455 + 413 = 14868
Step 37: 14868 + 413 = 15281
Step 38: 15281 + 413 = 15694
Step 39: 15694 + 413 = 16107
Step 40: 16107 + 413 = 16520
Step 41: 16520 + 413 = 16933
Step 42: 16933 + 413 = 17346
Step 43: 17346 + 413 = 17759
Step 44: 17759 + 413 = 18172
Step 45: 18172 + 413 = 18585
Step 46: 18585 + 413 = 18998
Step 47: 18998 + 413 = 19411
Step 48: 19411 + 413 = 19824
Step 49: 19824 + 413 = 20237
Step 50: 20237 + 413 = 20650
Step 51: 20650 + 413 = 21063
Step 52: 21063 + 413 = 21476
Step 53: 21476 + 413 = 21889
Step 54: 21889 + 413 = 22302
Step 55: 22302 + 413 = 22715
Step 56: 22715 + 413 = 23128
Step 57: 23128 + 413 = 23541
Step 58: 23541 + 413 = 23954
Step 59: 23954 + 413 = 24367
Step 60: 24367 + 413 = 24780
Step 61: 24780 + 413 = 25193
Step 62: 25193 + 413 = 25606
Step 63: 25606 + 413 = 26019
Step 64: 26019 + 413 = 26432
Step 65: 26432 + 413 = 26845
Step 66: 26845 + 413 = 27258
Step 67: 27258 + 413 = 27671
Step 68: 27671 + 413 = 28084
Step 69: 28084 + 413 = 28497
Step 70: 28497 + 413 = 28910
Step 71: 28910 + 413 = 29323
Step 72: 29323 + 413 = 29736
Step 73: 29736 + 413 = 30149
Step 74: 30149 + 413 = 30562
Step 75: 30562 + 413 = 30975
Step 76: 30975 + 413 = 31388
Step 77: 31388 + 413 = 31801
Step 78: 31801 + 413 = 32214
Step 79: 32214 + 413 = 32627
Step 80: 32627 + 413 = 33040
Step 81: 33040 + 413 = 33453
Step 82: 33453 + 413 = 33866
Step 83: 33866 + 413 = 34279
Step 84: 34279 + 413 = 34692
Step 85: 34692 + 413 = 35105
Step 86: 35105 + 413 = 35518

So, 413*86 = 35518