import java.util.ArrayList;
import java.util.Scanner;

/**
 * Created 2017/06/01.
 */
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    ArrayList<Double> ary = new ArrayList<>();

    while (true) {
      double input = Double.parseDouble(sc.next());
      ary.add(input);
      if (ary.size() == 1) break;
    }
    
    double a = ary.get(0);
    double x = Math.PI;
    
    double s = Math.pow(a,2) * x;
    double m = a * 2 * x;

    System.out.printf("%f",s);
    System.out.print(" ");
    System.out.printf("%f",m);
  }

}
/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