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

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(
            new InputStreamReader(System.in));
        String data = br.readLine();
        double r = Double.parseDouble(data);
        double circle1 = Math.PI * Math.pow(r, 2);
        double circle2 = 2 * Math.PI * r;

        System.out
            .println(String.format("%1$.5f %2$.5f", circle1, circle2));
    }
}
/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