OK, let's crack this. We're given 513 and our task is to multiply it by 6. Essentially, we'll be adding 513 to itself 6 times.
Step 1: 0 + 513 = 513
Step 2: 513 + 513 = 1026
Step 3: 1026 + 513 = 1539
Step 4: 1539 + 513 = 2052
Step 5: 2052 + 513 = 2565
Step 6: 2565 + 513 = 3078

So, 513*6 = 3078