Let's get this math done. We have 610 and we're going to multiply it by 4. This is the same as taking 610 and adding it to itself 4 times.
Step 1: 0 + 610 = 610
Step 2: 610 + 610 = 1220
Step 3: 1220 + 610 = 1830
Step 4: 1830 + 610 = 2440

So, 610*4 = 2440