import java.io.*;

public class Main {
	public static void main(String[] args) {
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
		String line;
		try {
			line = buf.readLine();
			double r = Double.parseDouble(line);
			System.out.printf("%.6f %.6f", Math.PI*r*r, 2*Math.PI*r);
		} 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