Sure thing, let's get straight to it. We start with 208 and we're going to multiply it by 86, which means adding 208 to itself 86 times.
Step 1: 0 + 208 = 208
Step 2: 208 + 208 = 416
Step 3: 416 + 208 = 624
Step 4: 624 + 208 = 832
Step 5: 832 + 208 = 1040
Step 6: 1040 + 208 = 1248
Step 7: 1248 + 208 = 1456
Step 8: 1456 + 208 = 1664
Step 9: 1664 + 208 = 1872
Step 10: 1872 + 208 = 2080
Step 11: 2080 + 208 = 2288
Step 12: 2288 + 208 = 2496
Step 13: 2496 + 208 = 2704
Step 14: 2704 + 208 = 2912
Step 15: 2912 + 208 = 3120
Step 16: 3120 + 208 = 3328
Step 17: 3328 + 208 = 3536
Step 18: 3536 + 208 = 3744
Step 19: 3744 + 208 = 3952
Step 20: 3952 + 208 = 4160
Step 21: 4160 + 208 = 4368
Step 22: 4368 + 208 = 4576
Step 23: 4576 + 208 = 4784
Step 24: 4784 + 208 = 4992
Step 25: 4992 + 208 = 5200
Step 26: 5200 + 208 = 5408
Step 27: 5408 + 208 = 5616
Step 28: 5616 + 208 = 5824
Step 29: 5824 + 208 = 6032
Step 30: 6032 + 208 = 6240
Step 31: 6240 + 208 = 6448
Step 32: 6448 + 208 = 6656
Step 33: 6656 + 208 = 6864
Step 34: 6864 + 208 = 7072
Step 35: 7072 + 208 = 7280
Step 36: 7280 + 208 = 7488
Step 37: 7488 + 208 = 7696
Step 38: 7696 + 208 = 7904
Step 39: 7904 + 208 = 8112
Step 40: 8112 + 208 = 8320
Step 41: 8320 + 208 = 8528
Step 42: 8528 + 208 = 8736
Step 43: 8736 + 208 = 8944
Step 44: 8944 + 208 = 9152
Step 45: 9152 + 208 = 9360
Step 46: 9360 + 208 = 9568
Step 47: 9568 + 208 = 9776
Step 48: 9776 + 208 = 9984
Step 49: 9984 + 208 = 10192
Step 50: 10192 + 208 = 10400
Step 51: 10400 + 208 = 10608
Step 52: 10608 + 208 = 10816
Step 53: 10816 + 208 = 11024
Step 54: 11024 + 208 = 11232
Step 55: 11232 + 208 = 11440
Step 56: 11440 + 208 = 11648
Step 57: 11648 + 208 = 11856
Step 58: 11856 + 208 = 12064
Step 59: 12064 + 208 = 12272
Step 60: 12272 + 208 = 12480
Step 61: 12480 + 208 = 12688
Step 62: 12688 + 208 = 12896
Step 63: 12896 + 208 = 13104
Step 64: 13104 + 208 = 13312
Step 65: 13312 + 208 = 13520
Step 66: 13520 + 208 = 13728
Step 67: 13728 + 208 = 13936
Step 68: 13936 + 208 = 14144
Step 69: 14144 + 208 = 14352
Step 70: 14352 + 208 = 14560
Step 71: 14560 + 208 = 14768
Step 72: 14768 + 208 = 14976
Step 73: 14976 + 208 = 15184
Step 74: 15184 + 208 = 15392
Step 75: 15392 + 208 = 15600
Step 76: 15600 + 208 = 15808
Step 77: 15808 + 208 = 16016
Step 78: 16016 + 208 = 16224
Step 79: 16224 + 208 = 16432
Step 80: 16432 + 208 = 16640
Step 81: 16640 + 208 = 16848
Step 82: 16848 + 208 = 17056
Step 83: 17056 + 208 = 17264
Step 84: 17264 + 208 = 17472
Step 85: 17472 + 208 = 17680
Step 86: 17680 + 208 = 17888

So, 208*86 = 17888