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

public class Main{


	public static void main(String[] args){

		BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));

		try{


			double r=Double.parseDouble(reader.readLine());

			double S=Math.PI*r*r;
			double l=Math.PI*2*r;
			System.out.printf("%6f %6f", S, l);

			reader.close();
		}catch(IOException e){
			System.out.println("??¨??????:"+e);

		}

	}

}
/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