Let's get this math done. We have 375 and we're going to multiply it by 4. This is the same as taking 375 and adding it to itself 4 times.
Step 1: 0 + 375 = 375
Step 2: 375 + 375 = 750
Step 3: 750 + 375 = 1125
Step 4: 1125 + 375 = 1500

So, 375*4 = 1500