import java.util.Scanner;

public class Main {
    private static Scanner scan;

    public static void main(String[] args) {
        scan = new Scanner(System.in);
        double r = scan.nextDouble();
        double π = 3.141592653589;
        System.out.println(
                String.format("%.6f",r * r * π) + " " + String.format("%.6f", (r + r) * π));
    }
}
/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