Pi [3.1416] times the square of a circle's radius give you the area of that circle:
3.1416 X 500 yards X 500 yards = 785,400.
Push it to 600 yards and you've got nearly 1,131,000 square yards of liberty. [
Push it to 600 yards and you've got nearly 1,131,000 square yards of liberty. [More]Concerned American does the math.