Let's get this math done. We have 617 and we're going to multiply it by 7. This is the same as taking 617 and adding it to itself 7 times.
Step 1: 0 + 617 = 617
Step 2: 617 + 617 = 1234
Step 3: 1234 + 617 = 1851
Step 4: 1851 + 617 = 2468
Step 5: 2468 + 617 = 3085
Step 6: 3085 + 617 = 3702
Step 7: 3702 + 617 = 4319

So, 617*7 = 4319