import java.util.Scanner;
import java.io.IOException;

class Main {
	public static void main(String[] args) throws IOException {
		Scanner scan = new Scanner(System.in);
		double r = scan.nextDouble();
		String a = String.format("%.5f", r * r * Math.PI);
		String b = String.format("%.5f", (r * 2) * Math.PI);
		System.out.println(a + " " + b);
	}
}
/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