Puzzle for March 24, 2010

Today is the anniversary of the worst oil spill in U.S. territory which occured when the supertanker Exxon Valdez, owned and operated by the Exxon Corporation, ran aground on a reef in Prince William Sound in southern Alaska in 1989. An estimated 11 million gallons of oil eventually spilled into the water.

How much area would a gallon of oil cover?

(A gallon is 0.133680556 cubic feet or 231 cubic inches per gallon)