import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    
	double r = sc.nextDouble();
	
	double area = Math.PI * (double)r * (double)r; 
        double cir = Math.PI * 2 * (double)r ;
	
	System.out.printf("%6f",area);
	System.out.printf(" ");
	System.out.printf("%6f\n",cir);	
  }
	


}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz