Let's roll up our sleeves and solve this. We have 427 and we're going to multiply it by 41, essentially adding 427 to itself 41 times.
Step 1: 0 + 427 = 427
Step 2: 427 + 427 = 854
Step 3: 854 + 427 = 1281
Step 4: 1281 + 427 = 1708
Step 5: 1708 + 427 = 2135
Step 6: 2135 + 427 = 2562
Step 7: 2562 + 427 = 2989
Step 8: 2989 + 427 = 3416
Step 9: 3416 + 427 = 3843
Step 10: 3843 + 427 = 4270
Step 11: 4270 + 427 = 4697
Step 12: 4697 + 427 = 5124
Step 13: 5124 + 427 = 5551
Step 14: 5551 + 427 = 5978
Step 15: 5978 + 427 = 6405
Step 16: 6405 + 427 = 6832
Step 17: 6832 + 427 = 7259
Step 18: 7259 + 427 = 7686
Step 19: 7686 + 427 = 8113
Step 20: 8113 + 427 = 8540
Step 21: 8540 + 427 = 8967
Step 22: 8967 + 427 = 9394
Step 23: 9394 + 427 = 9821
Step 24: 9821 + 427 = 10248
Step 25: 10248 + 427 = 10675
Step 26: 10675 + 427 = 11102
Step 27: 11102 + 427 = 11529
Step 28: 11529 + 427 = 11956
Step 29: 11956 + 427 = 12383
Step 30: 12383 + 427 = 12810
Step 31: 12810 + 427 = 13237
Step 32: 13237 + 427 = 13664
Step 33: 13664 + 427 = 14091
Step 34: 14091 + 427 = 14518
Step 35: 14518 + 427 = 14945
Step 36: 14945 + 427 = 15372
Step 37: 15372 + 427 = 15799
Step 38: 15799 + 427 = 16226
Step 39: 16226 + 427 = 16653
Step 40: 16653 + 427 = 17080
Step 41: 17080 + 427 = 17507

So, 427*41 = 17507