Sure thing! We've got 20 and we're gonna multiply it by 6. That's the same as adding 20 to itself 6 times.
Step 1: 0 + 20 = 20
Step 2: 20 + 20 = 40
Step 3: 40 + 20 = 60
Step 4: 60 + 20 = 80
Step 5: 80 + 20 = 100
Step 6: 100 + 20 = 120

So, 20*6 = 120