Without delay, let's solve this. We've got 802 and we will be multiplying it by 85, that is, adding 802 to itself 85 times.
Step 1: 0 + 802 = 802
Step 2: 802 + 802 = 1604
Step 3: 1604 + 802 = 2406
Step 4: 2406 + 802 = 3208
Step 5: 3208 + 802 = 4010
Step 6: 4010 + 802 = 4812
Step 7: 4812 + 802 = 5614
Step 8: 5614 + 802 = 6416
Step 9: 6416 + 802 = 7218
Step 10: 7218 + 802 = 8020
Step 11: 8020 + 802 = 8822
Step 12: 8822 + 802 = 9624
Step 13: 9624 + 802 = 10426
Step 14: 10426 + 802 = 11228
Step 15: 11228 + 802 = 12030
Step 16: 12030 + 802 = 12832
Step 17: 12832 + 802 = 13634
Step 18: 13634 + 802 = 14436
Step 19: 14436 + 802 = 15238
Step 20: 15238 + 802 = 16040
Step 21: 16040 + 802 = 16842
Step 22: 16842 + 802 = 17644
Step 23: 17644 + 802 = 18446
Step 24: 18446 + 802 = 19248
Step 25: 19248 + 802 = 20050
Step 26: 20050 + 802 = 20852
Step 27: 20852 + 802 = 21654
Step 28: 21654 + 802 = 22456
Step 29: 22456 + 802 = 23258
Step 30: 23258 + 802 = 24060
Step 31: 24060 + 802 = 24862
Step 32: 24862 + 802 = 25664
Step 33: 25664 + 802 = 26466
Step 34: 26466 + 802 = 27268
Step 35: 27268 + 802 = 28070
Step 36: 28070 + 802 = 28872
Step 37: 28872 + 802 = 29674
Step 38: 29674 + 802 = 30476
Step 39: 30476 + 802 = 31278
Step 40: 31278 + 802 = 32080
Step 41: 32080 + 802 = 32882
Step 42: 32882 + 802 = 33684
Step 43: 33684 + 802 = 34486
Step 44: 34486 + 802 = 35288
Step 45: 35288 + 802 = 36090
Step 46: 36090 + 802 = 36892
Step 47: 36892 + 802 = 37694
Step 48: 37694 + 802 = 38496
Step 49: 38496 + 802 = 39298
Step 50: 39298 + 802 = 40100
Step 51: 40100 + 802 = 40902
Step 52: 40902 + 802 = 41704
Step 53: 41704 + 802 = 42506
Step 54: 42506 + 802 = 43308
Step 55: 43308 + 802 = 44110
Step 56: 44110 + 802 = 44912
Step 57: 44912 + 802 = 45714
Step 58: 45714 + 802 = 46516
Step 59: 46516 + 802 = 47318
Step 60: 47318 + 802 = 48120
Step 61: 48120 + 802 = 48922
Step 62: 48922 + 802 = 49724
Step 63: 49724 + 802 = 50526
Step 64: 50526 + 802 = 51328
Step 65: 51328 + 802 = 52130
Step 66: 52130 + 802 = 52932
Step 67: 52932 + 802 = 53734
Step 68: 53734 + 802 = 54536
Step 69: 54536 + 802 = 55338
Step 70: 55338 + 802 = 56140
Step 71: 56140 + 802 = 56942
Step 72: 56942 + 802 = 57744
Step 73: 57744 + 802 = 58546
Step 74: 58546 + 802 = 59348
Step 75: 59348 + 802 = 60150
Step 76: 60150 + 802 = 60952
Step 77: 60952 + 802 = 61754
Step 78: 61754 + 802 = 62556
Step 79: 62556 + 802 = 63358
Step 80: 63358 + 802 = 64160
Step 81: 64160 + 802 = 64962
Step 82: 64962 + 802 = 65764
Step 83: 65764 + 802 = 66566
Step 84: 66566 + 802 = 67368
Step 85: 67368 + 802 = 68170

So, 802*85 = 68170