import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        {
            String strArr= br.readLine();
            double a=Double.parseDouble(strArr);
            double pi=3.14159265358979323846264338327950288419716939937510582;

            String men=String.format("%.5f",a*a*pi);
            String syu=String.format("%.5f",a*2*pi);
            System.out.println(men+" "+syu);
        }
    }
}
/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