Without delay, let's solve this. We've got 415 and we will be multiplying it by 4, that is, adding 415 to itself 4 times.
Step 1: 0 + 415 = 415
Step 2: 415 + 415 = 830
Step 3: 830 + 415 = 1245
Step 4: 1245 + 415 = 1660

So, 415*4 = 1660