import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	}

}
/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