OK, let's work through this together. We're starting with 513 and we're going to multiply it by 4, which means we add 513 to itself 4 times.
Step 1: 0 + 513 = 513
Step 2: 513 + 513 = 1026
Step 3: 1026 + 513 = 1539
Step 4: 1539 + 513 = 2052

So, 513*4 = 2052