import java.util.Scanner;
public class Main{
public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	double r = sc.nextDouble();
	sc.close();
	System.out.printf("%f %f", r * r* Math.PI, 2 * r * Math.PI);
}
}
/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