import java.util.*;
public class Main{
public static void main(String[] args){
Scanner scan=new Scanner(System.in);
double r=scan.nextDouble();
double S=Math.PI*r*r*1.0;
double d=2*Math.PI*r*1.0;
System.out.println(String.format("%5f",S)+" "+String.format("%5f",d));
}}
/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