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)

MODE = "stdio"

line = Array.new

if(defined? MODE)
  line = STDIN.read.split("\n")
else
  tmp = "\
  2
  ".split("\n")
  tmp.each{|s|
    line << s.strip
  }
end



r = line[0].split(" ").map(&:to_f)

printf("%.10f %.10f\n",(-1.arg)*r[0]**2,2*(-1.arg)*r[0])