Let's get this math done. We have 1 and we're going to multiply it by 10. This is the same as taking 1 and adding it to itself 10 times.
Step 1: 0 + 1 = 1
Step 2: 1 + 1 = 2
Step 3: 2 + 1 = 3
Step 4: 3 + 1 = 4
Step 5: 4 + 1 = 5
Step 6: 5 + 1 = 6
Step 7: 6 + 1 = 7
Step 8: 7 + 1 = 8
Step 9: 8 + 1 = 9
Step 10: 9 + 1 = 10

So, 1*10 = 10