Sure thing, let's get straight to it. We start with 802 and we're going to multiply it by 51, which means adding 802 to itself 51 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

So, 802*51 = 40902