Luas & Volume Bola Java

package com.tutorial;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner userInput = new Scanner(System.in);

        float phi = 3.14f;
        float rusuk, luas, volume;

        System.out.println("\t Luas dan Volume Bola \n");

        System.out.print("\n Masukkan Rusuk : ");
        rusuk = userInput.nextFloat();

        luas = 4 * phi * rusuk * rusuk;
        System.out.println("\n Luas Bola   : " + luas);

        volume = 4 / (float) 3 * phi * rusuk * rusuk * rusuk;
        System.out.println(" Volume Bola : " + volume);
    }
}