What is 20 sq ft? is it 20 foot by 20 foot? I am trying to remodel and i dont want to grab too...

I am trying to remodel and i dont want to grab too much hardwood if i dont obligation it.one box says 20 sq ft and my living room isnt even 50ft by 50ft
Answers:    Square foot is figured by multyplying the extent times the length. 4 feet X 5 foot = 20 sq. ft.
square feet is ( foot times feet ) 4 x 5 = 20...2 x 10 = 20 etc.