import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        
        double r = scan.nextDouble();
        
        double S = r * r * Math.PI;
        double R = 2 * r * Math.PI;

        String str = String.format("%.6f", S);
        String rstr = String.format("%.6f", R);
        System.out.println(str + " " + rstr);
    }
}
/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