Let's roll up our sleeves and solve this. We have 606 and we're going to multiply it by 4, essentially adding 606 to itself 4 times.
Step 1: 0 + 606 = 606
Step 2: 606 + 606 = 1212
Step 3: 1212 + 606 = 1818
Step 4: 1818 + 606 = 2424

So, 606*4 = 2424