Let's roll up our sleeves and solve this. We have 510 and we're going to multiply it by 14, essentially adding 510 to itself 14 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
Step 7: 3060 + 510 = 3570
Step 8: 3570 + 510 = 4080
Step 9: 4080 + 510 = 4590
Step 10: 4590 + 510 = 5100
Step 11: 5100 + 510 = 5610
Step 12: 5610 + 510 = 6120
Step 13: 6120 + 510 = 6630
Step 14: 6630 + 510 = 7140

So, 510*14 = 7140