#john bain
#variable improvement exercise
#05-09-12

import math

r = input("please enter the radius of the circle: ")

c = 2* math.pi * r
c = round(C,2)

a = math.pi * R**2
a = round(a,2)

print("The circumference of this circle is {0}.".format(c))
print("The area of this circle is {0}.".format(A))
