Without delay, let's solve this. We've got 451 and we will be multiplying it by 18, that is, adding 451 to itself 18 times.
Step 1: 0 + 451 = 451
Step 2: 451 + 451 = 902
Step 3: 902 + 451 = 1353
Step 4: 1353 + 451 = 1804
Step 5: 1804 + 451 = 2255
Step 6: 2255 + 451 = 2706
Step 7: 2706 + 451 = 3157
Step 8: 3157 + 451 = 3608
Step 9: 3608 + 451 = 4059
Step 10: 4059 + 451 = 4510
Step 11: 4510 + 451 = 4961
Step 12: 4961 + 451 = 5412
Step 13: 5412 + 451 = 5863
Step 14: 5863 + 451 = 6314
Step 15: 6314 + 451 = 6765
Step 16: 6765 + 451 = 7216
Step 17: 7216 + 451 = 7667
Step 18: 7667 + 451 = 8118

So, 451*18 = 8118