Alright, let's solve this math problem step by step. First, we have the number 408. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 86. So, we're going to take the number 408 and add it to itself 86 times.
Step 1: 0 + 408 = 408
Step 2: 408 + 408 = 816
Step 3: 816 + 408 = 1224
Step 4: 1224 + 408 = 1632
Step 5: 1632 + 408 = 2040
Step 6: 2040 + 408 = 2448
Step 7: 2448 + 408 = 2856
Step 8: 2856 + 408 = 3264
Step 9: 3264 + 408 = 3672
Step 10: 3672 + 408 = 4080
Step 11: 4080 + 408 = 4488
Step 12: 4488 + 408 = 4896
Step 13: 4896 + 408 = 5304
Step 14: 5304 + 408 = 5712
Step 15: 5712 + 408 = 6120
Step 16: 6120 + 408 = 6528
Step 17: 6528 + 408 = 6936
Step 18: 6936 + 408 = 7344
Step 19: 7344 + 408 = 7752
Step 20: 7752 + 408 = 8160
Step 21: 8160 + 408 = 8568
Step 22: 8568 + 408 = 8976
Step 23: 8976 + 408 = 9384
Step 24: 9384 + 408 = 9792
Step 25: 9792 + 408 = 10200
Step 26: 10200 + 408 = 10608
Step 27: 10608 + 408 = 11016
Step 28: 11016 + 408 = 11424
Step 29: 11424 + 408 = 11832
Step 30: 11832 + 408 = 12240
Step 31: 12240 + 408 = 12648
Step 32: 12648 + 408 = 13056
Step 33: 13056 + 408 = 13464
Step 34: 13464 + 408 = 13872
Step 35: 13872 + 408 = 14280
Step 36: 14280 + 408 = 14688
Step 37: 14688 + 408 = 15096
Step 38: 15096 + 408 = 15504
Step 39: 15504 + 408 = 15912
Step 40: 15912 + 408 = 16320
Step 41: 16320 + 408 = 16728
Step 42: 16728 + 408 = 17136
Step 43: 17136 + 408 = 17544
Step 44: 17544 + 408 = 17952
Step 45: 17952 + 408 = 18360
Step 46: 18360 + 408 = 18768
Step 47: 18768 + 408 = 19176
Step 48: 19176 + 408 = 19584
Step 49: 19584 + 408 = 19992
Step 50: 19992 + 408 = 20400
Step 51: 20400 + 408 = 20808
Step 52: 20808 + 408 = 21216
Step 53: 21216 + 408 = 21624
Step 54: 21624 + 408 = 22032
Step 55: 22032 + 408 = 22440
Step 56: 22440 + 408 = 22848
Step 57: 22848 + 408 = 23256
Step 58: 23256 + 408 = 23664
Step 59: 23664 + 408 = 24072
Step 60: 24072 + 408 = 24480
Step 61: 24480 + 408 = 24888
Step 62: 24888 + 408 = 25296
Step 63: 25296 + 408 = 25704
Step 64: 25704 + 408 = 26112
Step 65: 26112 + 408 = 26520
Step 66: 26520 + 408 = 26928
Step 67: 26928 + 408 = 27336
Step 68: 27336 + 408 = 27744
Step 69: 27744 + 408 = 28152
Step 70: 28152 + 408 = 28560
Step 71: 28560 + 408 = 28968
Step 72: 28968 + 408 = 29376
Step 73: 29376 + 408 = 29784
Step 74: 29784 + 408 = 30192
Step 75: 30192 + 408 = 30600
Step 76: 30600 + 408 = 31008
Step 77: 31008 + 408 = 31416
Step 78: 31416 + 408 = 31824
Step 79: 31824 + 408 = 32232
Step 80: 32232 + 408 = 32640
Step 81: 32640 + 408 = 33048
Step 82: 33048 + 408 = 33456
Step 83: 33456 + 408 = 33864
Step 84: 33864 + 408 = 34272
Step 85: 34272 + 408 = 34680
Step 86: 34680 + 408 = 35088

So, 408*86 = 35088