# make all of the functions in the "math" module available to this program
import math

# ask the user for the radius of a circle
radius = int(input("Enter the radius of a circle: "))

# compute the area
area = math.pi * math.pow(radius, 2)

# compute the circum
circum = 2 * math.pi * radius

# output
print ("Area:", area)
print ("Circum:", circum)