import java.lang.Math;
import java.util.Scanner;
class Main {
	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		String s = sc.next();
		double r = Double.parseDouble(s);
		System.out.println(String.format("%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