import java.io.*;

	

	public class RumusLingkaran{

	    public static void main(String args[]){

	        try{

	            float nilair;

	            float kel;

	            float luas;

	            float pi = 3.14f;

	            System.out.println("Menghitung Luas Dan Keliling Lingkaran");

	            System.out.print("Masukan Jari Jari R:");

	            BufferedReader r = new BufferedReader(new InputStreamReader(System.in));

	            nilair = Float.parseFloat(r.readLine());

	            

	            kel = 2 * pi * nilair;

	            luas = pi * (nilair * nilair);

	            System.out.println("Luas Lingkaran : " + luas);

	            System.out.println("Keliling Lingkaran : " + kel);

	        }

	        catch (IOException ie){

	            System.out.println(ie.getMessage());

	        }

	    }

	}