import java.util.Scanner;                                                                     
class Main {
 
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
          double a = in.nextDouble();
          double c = (double)2*3.141592653589*a;
          double b = (double)a*a*3.141592653589;
          System.out.println(String.format("%.6f",b) + " " +String.format("%.6f",c));
    }
}
/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