import java.io.*;
public class Main {
	
		public static void main(String[] args) throws IOException{
			
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			String str = br.readLine();
			
			double r = Double.parseDouble(str);
			
			System.out.printf("%6f %6f",r*r*Math.PI ,2*r*Math.PI );
			
			
			
		}

}
/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