Social Security question/ help please if you know

Here's how I did the math. I'm also partial at 62 and full at 66.5 years old. I took the money I would collect in 4.5 years divided by the extra amount per month from waiting. That'll give you how many months it would take to break even. Divide that by 12 to get how many years it would take. It's about 18 years for me, or age 85 to break even. Even a math flunky can get this one right. 62 it is!