

import java.util.Scanner;

public class Main {
	public static void main(String [] args){
		//????????£?????????????????????
		Scanner sc = new Scanner(System.in);
		double P = Math.PI;
		//???????????????
		double  radius = sc.nextDouble();
		//????????¢??? ?????????????? ???????¨???
		double area = radius * radius * P;
		//?????¨????????? ??´??????????¨???
		double circumference = (radius + radius) * P;
		//?°???°???
		String strArea = String.format("%.5f", area);
		//???????????¨???
		System.out.println(strArea +" "+ circumference);
	}
}
/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