OK, let's work through this together. We're starting with 425 and we're going to multiply it by 4, which means we add 425 to itself 4 times.
Step 1: 0 + 425 = 425
Step 2: 425 + 425 = 850
Step 3: 850 + 425 = 1275
Step 4: 1275 + 425 = 1700

So, 425*4 = 1700