import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        double r = scan.nextDouble();

        double pi = 3.1415926535897;
        
        String area = String.format("%.5f", pi * r * r);
        String arc = String.format("%.5f", 2.0 * pi * r);

        System.out.println(area + " " + arc);
    }
}
        
/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