import java.text.DecimalFormat;
import java.util.Scanner;

/**
 *
 * @author lenovo
 */
public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double r = scanner.nextDouble();

        double a, b;
        a = 3.141592653589 * r * r;
        b = 3.141592653589 * 2 * r;
        DecimalFormat df = new DecimalFormat("0.000000000");

        System.out.println(df.format(a) + " " + df.format(b));
    }
}
/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