import java.util.Scanner;
import java.math.*;
class Main {
    public static void main(String args[]) {
        Scanner scan = new Scanner(System.in);
        double r = scan.nextDouble();

        double area = Math.PI * r * r;
        double circumference = 2 * Math.PI * r;

        String areastr = String.format("%.6f", area);
        String circumferencestr = String.format("%.6f", circumference);

        System.out.println(areastr + " " + circumferencestr);

    }
}
/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