import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DecimalFormat;

public class Main {

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

        DecimalFormat df1 = new DecimalFormat("0.00000");
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        double r = Double.valueOf(br.readLine());

        double pi = Math.PI;

        String S = df1.format((double)( r * r * pi));
        String L = df1.format((double)( 2 * r * pi));

        System.out.println(S + " " + 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