import java.util.*;
public class lingkaran
{
    public static void main (String [] args)
    {
        Scanner input = new Scanner(System.in);
        double phi = 3.14;
        double r, luas, keliling;

        System.out.println("Program Luas Lingkaran\n");
        System.out.println("Masukkan panjang jari-jari : ");
        r = input.nextDouble();

        luas = 0.5*phi*r*r;
        keliling = 2*phi*r;

        System.out.println("Luas Lingkaran = "+luas + "\nKeliling Lingkaran = "+keliling);
    }
}