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)

a = gets.to_i

x = (a.to_f * a.to_f * 3.141592.to_f)
y = (a.to_f * 2.to_f * 3.141592.to_f)

ans = [x, y]
 
puts ans.join(" ")