Let's get this math done. We have 606 and we're going to multiply it by 7. This is the same as taking 606 and adding it to itself 7 times.
Step 1: 0 + 606 = 606
Step 2: 606 + 606 = 1212
Step 3: 1212 + 606 = 1818
Step 4: 1818 + 606 = 2424
Step 5: 2424 + 606 = 3030
Step 6: 3030 + 606 = 3636
Step 7: 3636 + 606 = 4242

So, 606*7 = 4242