import java.util.Scanner;
class Main {
	
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		double radius = scanner.nextDouble();
		double pi = 3.141592653589;
		double are = radius*radius*pi;
		double cir = 2*radius*pi;
		String area = String.format("%.8f", are);
		String circ = String.format("%.8f", cir);
		
		System.out.println(area+" "+circ);
	}	
}
/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