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

public class Main {

	public static void main(String[] args) {


        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
            String inputData = reader.readLine();

            BigDecimal r = new BigDecimal(inputData);
			BigDecimal bdPI = new BigDecimal(3.14159265358979323846d);

			BigDecimal area = r.pow(2).multiply(bdPI).setScale(6, BigDecimal.ROUND_HALF_UP);
			BigDecimal round = bdPI.multiply(r).multiply(new BigDecimal(2)).setScale(6, BigDecimal.ROUND_HALF_UP);

            System.out.println(area.toPlainString() + " " + round.toPlainString());

        } catch (IOException e) {
            e.printStackTrace();
        }

	}

}
/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