import java.math.BigDecimal;
import java.util.Scanner;

public class Main {
	
	public static void main (String[] args) {

		Scanner sc = new Scanner(System.in);
		
		BigDecimal r = BigDecimal.valueOf(sc.nextDouble());
		BigDecimal pi = BigDecimal.valueOf(Math.PI);
		
		System.out.println(r.pow(2).multiply(pi) + " " + BigDecimal.valueOf(2).multiply(pi).multiply(r));
		
		sc.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