import java.text.DecimalFormat;
import java.util.Scanner;

public class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		DecimalFormat df = new DecimalFormat("####################.####################");

		double r = scan.nextDouble();

		System.out.println(df.format(r * r * Math.PI) + " " + df.format((r+r) * Math.PI));


		scan.close();

	}
}
/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