# Sarah Buchanan
# May 24, 2012
# Short program that lets the user choose the circumference of an enclosure with a fence.
#From this the program calculates the area of that circular enclosure.
import math
circum = float(input("How much fence have you bought in feet?"))
radius = circum/(2*math.pi)
area = math.pi*radius*radius
print('The area of your enclosure with circumference',circum,
'feet of fence is', area, 'square feet.')