OK, let's work through this together. We're starting with 510 and we're going to multiply it by 6, which means we add 510 to itself 6 times.
Step 1: 0 + 510 = 510
Step 2: 510 + 510 = 1020
Step 3: 1020 + 510 = 1530
Step 4: 1530 + 510 = 2040
Step 5: 2040 + 510 = 2550
Step 6: 2550 + 510 = 3060

So, 510*6 = 3060