import java.io.*;
import java.util.*;
import java.lang.Math;
 
class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader re =
         new BufferedReader(new InputStreamReader(System.in));       
        String line = re.readLine();       
         
        double r = Double.valueOf(line);       
        
        double square= r * r * Math.PI;
        double circle= 2 * r * Math.PI;
        
        System.out.printf("%.5f %.5f \n",square,circle);
        re.close();
    }
}
/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