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

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);

//		?????? r ???????????¢?????¨?????¨?????????????±???????????????°?????????????????????????????????

		double r = Double.parseDouble(scan.next());

		double area = r * r * Math.PI;
		double length = 2 * r * Math.PI;

		System.out.printf("%.6f %.6f",  area, length);

	}
}
/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