import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

import static java.lang.Math.PI;

public class Main{
    public static void main(String[] args) {
	try {
	    BufferedReader stdReader = new BufferedReader(new InputStreamReader(System.in));
	    String line;
	    while ((line = stdReader.readLine()) != null) {
		Double r = Double.parseDouble(line);
		System.out.println( String.format("%f %f", PI*r*r, 2*PI*r) );
	    }
	    stdReader.close();
	} catch (Exception e) {
	    System.out.println(Arrays.toString(e.getStackTrace()));
	    System.exit(0);
	}
    }
}
/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