Without delay, let's solve this. We've got 376 and we will be multiplying it by 15, that is, adding 376 to itself 15 times.
Step 1: 0 + 376 = 376
Step 2: 376 + 376 = 752
Step 3: 752 + 376 = 1128
Step 4: 1128 + 376 = 1504
Step 5: 1504 + 376 = 1880
Step 6: 1880 + 376 = 2256
Step 7: 2256 + 376 = 2632
Step 8: 2632 + 376 = 3008
Step 9: 3008 + 376 = 3384
Step 10: 3384 + 376 = 3760
Step 11: 3760 + 376 = 4136
Step 12: 4136 + 376 = 4512
Step 13: 4512 + 376 = 4888
Step 14: 4888 + 376 = 5264
Step 15: 5264 + 376 = 5640

So, 376*15 = 5640