Question 727736
1 square mile is a square which is 1 mile x 1 mile
1 mile = 5280 ft, so the 1 square mile is
{{{ 5280*5280 = 27878400 }}} ft2
( square ft / square mile ) x ( square miles ) = square ft
{{{ ( 27878400 / 1 )*20 = 557568000 }}}
557,568,000 square ft