

import java.util.Scanner;

public class Main {
	private static final int PI = 0;

	public static void main(String[] args){
		//????????£????????????????????°?????????????????£?¨?
		Scanner sc = new Scanner(System.in);
		//?????¨????????£?¨?
		double P=Math.PI;
		//????????????????????£?????\???
		double dbR = sc.nextDouble();
		//??¢???
		double dbS =dbR * dbR * P;
		//?????¨?????????
		double dbC =(dbR + dbR) * P;
		 //?¨??????????db????????°??????string???????????????
		 String f1 = String.format("%.6f", dbS);
		 String f2 = String.format("%.6f", dbC);
		//???????????¨???
		System.out.println(f1 + " " + f2);

	}
}
/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