import java.util.Scanner;
import java.lang.Math;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        double r = sc.nextDouble();

        String menseki = String.format("%.5f", r*r*Math.PI);
        String hankei = String.format("%.5f", 2*r*Math.PI);

        System.out.println(menseki+" "+hankei);
    }
}
/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