import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws Exception{

		double r, area, circumference;

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        r = Double.parseDouble(br.readLine());

        area = r * r *  Math.PI;
        circumference = 2 * r *  Math.PI;
        System.out.println(String.format("%.6f", area) + " " + String.format("%.6f", circumference));

	}

}
/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