Problem:
Circle

Write a program which calculates the area and circumference of a circle for given radius r.

Input

A real number r is given.

Output

Print the area and circumference of the circle in a line. Put a single space between them. The output should not contain an absolute error greater than 10-5.

Constraints

0 < r < 10000

Sample Input 1

2

Sample Output 1

12.566371 12.566371

Sample Input 2

3

Sample Output 2

28.274334 18.849556

Solution in Ruby (judge verdict: Accepted)

r = STDIN.gets.to_f
#
# r = 34.1201
#
#
#
 puts "#{ sprintf("%.6f",r*r*Math::PI) } #{sprintf("%.6f", r*2*Math::PI )}"
#





# r = 2
# res = r*r*Math::PI
#
# def s(v)
#   sprintf("%.6f", v)
# end
#
# p s(res)