

import java.util.Scanner;

public class Main{
	public static void main(String[] args){
		//????????£?????????????????????
		Scanner sc = new Scanner(System.in);
		//?????¨???
		//double n = Math.PI;
		//??????r?????????
		double r = sc.nextDouble();
		//????????¢??? ?????????????????????¨???
		double Area = r * r * Math.PI;
		//???????????¨ ??´????? ?????¨???
		double Pi = r * 2 * Math.PI;
		//
		String strArea = String.format("%6f", Area);

		//
		String strPi = String.format("%6f", Pi);

		//???????????¨???
		System.out.println(strArea + " "+ strPi);
	}
}
/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