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

public class Main {
	public static void main(String[] args){
		double r, m, s;
		DecimalFormat t = new DecimalFormat("0.000000");
		t.setRoundingMode(RoundingMode.HALF_UP);
		Scanner sc = new Scanner(System.in);
		r = sc.nextDouble();
		m = r * r * 3.141592653589;
		s = (r + r) * 3.141592653589;
		System.out.println(t.format(m) + " " + t.format(s));
	}
}
/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