OK, let's work through this together. We're starting with 245 and we're going to multiply it by 4, which means we add 245 to itself 4 times.
Step 1: 0 + 245 = 245
Step 2: 245 + 245 = 490
Step 3: 490 + 245 = 735
Step 4: 735 + 245 = 980

So, 245*4 = 980