import java.util.Scanner;
import java.lang.Math;

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 l=2*r*Math.PI;
                String ss=String.format("%.5f",s);
                String ll=String.format("%.5f",l);
                System.out.println(ss+" "+ll);
        }
}
/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