import java.util.Scanner;
import java.lang.Math;

class Main{

    public static void main(String[] args){

	Scanner scan = new Scanner(System.in);
	double r = scan.nextDouble();

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

	System.out.printf("%f %f\n", area, 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