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 JAVA (judge verdict: Accepted)

import java.util.Scanner;

class Main{
  public static void main(String[] args) {
    
	  Scanner sc = new Scanner(System.in);
	  
	  double r = sc.nextDouble();
	  double ritu = Math.PI;
	  double men = 0;
	  double shuu = 0;
	  
	  //String  = String.format("%.5f", );
	  men = r*r*ritu;
	  shuu = 2 * ritu * r;
	  
	  String strmen = String.format("%.6f",men );
	  String strshuu = String.format("%.6f",shuu );
	  
	  System.out.println(strmen+" "+strshuu);
  }
}