Without delay, let's solve this. We've got 318 and we will be multiplying it by 40, that is, adding 318 to itself 40 times.
Step 1: 0 + 318 = 318
Step 2: 318 + 318 = 636
Step 3: 636 + 318 = 954
Step 4: 954 + 318 = 1272
Step 5: 1272 + 318 = 1590
Step 6: 1590 + 318 = 1908
Step 7: 1908 + 318 = 2226
Step 8: 2226 + 318 = 2544
Step 9: 2544 + 318 = 2862
Step 10: 2862 + 318 = 3180
Step 11: 3180 + 318 = 3498
Step 12: 3498 + 318 = 3816
Step 13: 3816 + 318 = 4134
Step 14: 4134 + 318 = 4452
Step 15: 4452 + 318 = 4770
Step 16: 4770 + 318 = 5088
Step 17: 5088 + 318 = 5406
Step 18: 5406 + 318 = 5724
Step 19: 5724 + 318 = 6042
Step 20: 6042 + 318 = 6360
Step 21: 6360 + 318 = 6678
Step 22: 6678 + 318 = 6996
Step 23: 6996 + 318 = 7314
Step 24: 7314 + 318 = 7632
Step 25: 7632 + 318 = 7950
Step 26: 7950 + 318 = 8268
Step 27: 8268 + 318 = 8586
Step 28: 8586 + 318 = 8904
Step 29: 8904 + 318 = 9222
Step 30: 9222 + 318 = 9540
Step 31: 9540 + 318 = 9858
Step 32: 9858 + 318 = 10176
Step 33: 10176 + 318 = 10494
Step 34: 10494 + 318 = 10812
Step 35: 10812 + 318 = 11130
Step 36: 11130 + 318 = 11448
Step 37: 11448 + 318 = 11766
Step 38: 11766 + 318 = 12084
Step 39: 12084 + 318 = 12402
Step 40: 12402 + 318 = 12720

So, 318*40 = 12720