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

public class Main{

    public static void main(String argv[])
    {
	Scanner scan = new Scanner(System.in);
	DecimalFormat df = new DecimalFormat("0.000000");
	double r = scan.nextDouble();
	double S,L;

	S = Math.pow(r,2) * Math.PI;
	L = 2 * r * Math.PI;
	System.out.println(df.format(S)+" "+df.format(L));
    }
}
/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