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: Wrong Answer)

include Math

def s_l(r)
  s = 2 * PI * r
  l = PI * r * r
  l.to_s + " " + s.to_s + "\n"
end
r = gets.to_i
puts s_l(r)