1970 penny s mint small date weight 3.1 floating roof

Looks like you took a picture of your coin in one of those coin identifier apps and it told you it is a small date with a floating roof. It may have told you it's worth a lot of money, and a genuine small date 1970-S would be. These apps are good (usually) at identifying coins. However, this looks like a large date. In the small date, the 7 lines up with the other numbers and LIBERTY is weak. On your coin, the 7 appears a bit lower than the other numbers and LIBERTY is strong. A large date circulated with a floating roof may get a couple of dollars.