Sure thing, let's get straight to it. We start with 625 and we're going to multiply it by 7, which means adding 625 to itself 7 times.
Step 1: 0 + 625 = 625
Step 2: 625 + 625 = 1250
Step 3: 1250 + 625 = 1875
Step 4: 1875 + 625 = 2500
Step 5: 2500 + 625 = 3125
Step 6: 3125 + 625 = 3750
Step 7: 3750 + 625 = 4375

So, 625*7 = 4375