

import java.util.Scanner;

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

		//??\??????????????? ??????r
		double r =sc.nextDouble();
		//?????¨????????£?¨?
		double P = Math.PI;
		//????????¢??? ??¬??? ?????????????????????¨???
		double AreaCircle = r * r * P;
		//?????¨????????? ??¬??? ?????¨????????? = ??´??????????¨???
		double Arch =(r + r) * P;
		//?°???°???????????´
		String fAreaCircle = String.format("%.6f", AreaCircle);
		//?°???°???????????´
		String  fArch = String.format("%.6f", Arch);
		//???????????¨???
		System.out.printf(fAreaCircle + " " + fArch);
	}
}
/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