You cannot convert area to linear measurement.
You don't. You can't convert that.
how do I convert 80 feet into square footage?
You want to convert an area into a length or distance. That is not possible.
You don't convert that. It just doesn't make sense.
Not possible to convert a linear measure to an area measure.
Multiply the length by the width.
Divide feet by 5,280 to get miles.
You multiply the number of feet by 0.3048.