OK, let's work through this together. We're starting with 519 and we're going to multiply it by 4, which means we add 519 to itself 4 times.
Step 1: 0 + 519 = 519
Step 2: 519 + 519 = 1038
Step 3: 1038 + 519 = 1557
Step 4: 1557 + 519 = 2076

So, 519*4 = 2076