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import java.util.Scanner;

/**
 * Created by ahmad on 01/04/17.
 */
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.print("Masukkan Panjang Jari-jari : ");
        r = input.nextDouble();

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

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