Wikipedia says that 10/28 is 3.618 km. For the runway itself to be 2 km², it would have to be 0.552 km wide. A quick glance at an aerial map indicates that a width of 0.552 km gives approximately the width of both runways, relevant taxiways, and the surrounding ground. Wikipedia says that the runways are in fact .061 km wide, for a total per-runway size of .221 km².

I picked Midway because it's a very conveniently sized airport, being almost exactly 1 mi² in a square-shaped with obvious meter marks (due to surrounding grid system).