import java.util.*;

class Main {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      final double PI = 3.141592653589;
      double r = sc.nextDouble();
      System.out.printf("%f %f\n", (r * r * PI), (2 * r * PI));
   }
}
/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