OK, let's crack this. We're given 395 and our task is to multiply it by 4. Essentially, we'll be adding 395 to itself 4 times.
Step 1: 0 + 395 = 395
Step 2: 395 + 395 = 790
Step 3: 790 + 395 = 1185
Step 4: 1185 + 395 = 1580

So, 395*4 = 1580