public class GayaGravitasi
{
    public static void main(String[] args)
    {
        final double GRAVITASI = 6.674E-11; // Konstanta gravitasi
        double m1 = 40, m2 = 30;            // Massa objek 1 dan objek 2
        double r = 2;                       // Jarak antara objek 1 dan objek 2
        double force;                       // Gaya tarik gravitasi

        // Tuliskan kode Anda di bawah!
        
        double a1 = GRAVITASI * m1 *m2;
        double a2 = r*r;

        double a3 = a1/a2;
        String forcea = Double.toString(a3);
        String forcex = "F = " + forcea;

        System.out.print(forcex);


    }
}