Sure thing, let's get straight to it. We start with 125 and we're going to multiply it by 7, which means adding 125 to itself 7 times.
Step 1: 0 + 125 = 125
Step 2: 125 + 125 = 250
Step 3: 250 + 125 = 375
Step 4: 375 + 125 = 500
Step 5: 500 + 125 = 625
Step 6: 625 + 125 = 750
Step 7: 750 + 125 = 875

So, 125*7 = 875