import java.util.Scanner;
class Main{
	public void Germany() {
		Scanner sc = new Scanner(System.in);
		double r,men,syu;
		double ens = 3.141592653589;
		r = sc.nextDouble();
		men = ens * (r * r);
		syu = 2 * ens * r;
		System.out.printf("%2.6f %2.6f",men,syu);
	}
	    public static void main(String[] args) {
	        new Main().Germany();
	    }
	}
/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