Help with java math... SOLVED

Code:

`import java.util.Scanner;`

public class Sphere

{

public static void main(String [] a)

{

System.out.println("This program prints surface area and volume");

System.out.println("of spheres for radii ranging from 10 to N,");

System.out.print("in increments of 10. Please input the value of N: ");

Scanner userInput = new Scanner(System.in);

int valueOfN = userinput.nextInt();

double pi = 3.14;

System.out.println("---------------------");

System.out.println("\t\tSurface");

System.out.println("r\tArea\tVolume");

System.out.println("---------------------");

for(int r = 10; r <= valueOfN; r += 10)

{

System.out.print(r + "\t" + (4*pi*(r*r)) + "\t" + (4/3*pi*(r*r*r)));

}

}

}

hi everyone, im currently in university doing an intro to java course and we were give some sample questions from the previous years midterm to try out. I wrote this in order to find surface area and volum of a sphere from radii 10 to N. other than some rounding issues the surface area works however the volume doesn't. it appears to me when running the program that all it will do is the math of pi*r^3 but completely leave out the 4/3. anyone have an idea of either why its doing that or how I can fix it. I've tried rewriting the math several ways but still appears to be doing the same thing with omitting the 4/3