Let's get this math done. We have 609 and we're going to multiply it by 7. This is the same as taking 609 and adding it to itself 7 times.
Step 1: 0 + 609 = 609
Step 2: 609 + 609 = 1218
Step 3: 1218 + 609 = 1827
Step 4: 1827 + 609 = 2436
Step 5: 2436 + 609 = 3045
Step 6: 3045 + 609 = 3654
Step 7: 3654 + 609 = 4263

So, 609*7 = 4263