import java.util.*;
import java.lang.Math;

public class Main{
public static void main(String[] args){
try{
double r = new Scanner(System.in).nextDouble();
double S = r * r * Math.PI;
double L = 2 * r * Math.PI;

System.out.printf("%.5f %.5f\n", S, L);

}catch(InputMismatchException e){
System.out.println(e);
}
}
}
/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