OK, let's work through this together. We're starting with 608 and we're going to multiply it by 4, which means we add 608 to itself 4 times.
Step 1: 0 + 608 = 608
Step 2: 608 + 608 = 1216
Step 3: 1216 + 608 = 1824
Step 4: 1824 + 608 = 2432

So, 608*4 = 2432