Let's get this math done. We have 25 and we're going to multiply it by 7. This is the same as taking 25 and adding it to itself 7 times.
Step 1: 0 + 25 = 25
Step 2: 25 + 25 = 50
Step 3: 50 + 25 = 75
Step 4: 75 + 25 = 100
Step 5: 100 + 25 = 125
Step 6: 125 + 25 = 150
Step 7: 150 + 25 = 175

So, 25*7 = 175