Sure thing, let's get straight to it. We start with 505 and we're going to multiply it by 4, which means adding 505 to itself 4 times.
Step 1: 0 + 505 = 505
Step 2: 505 + 505 = 1010
Step 3: 1010 + 505 = 1515
Step 4: 1515 + 505 = 2020

So, 505*4 = 2020