instruction: How large is the runway of the Richton-Perry County Airport?
context: Richton-Perry County Airport covers an area of 55 acres (22 ha) at an elevation of 167 feet (51 m) above mean sea level. It has one runway designated 18/36 with an asphalt surface measuring 3,000 by 60 feet (914 x 18 m).
  
  For the 12-month period ending November 17, 2011, the airport had 1,400 general aviation aircraft operations, an average of 116 per month. At that time there were two single-engine aircraft based at this airport.
response: The single runway at the Richton-Perry County Airport is 18000 square feet in area (it's dimensions are 3,000 by 60 feet)