import java.util.Scanner;
class Main{
    public static void main(String[] args){
  
            Scanner scan = new Scanner(System.in);
  
            double r =  scan.nextDouble();
            double s,l,p = 3.141592653589;
          
            s = r*r*p;
            l = 2*r*p;
  
           System.out.printf("%f %f\n",s,l);
        }
}
/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