Volume of a sphere problem

Hey, I got this problem for my school lab and I just don't get how to do it.

The problem is this.

"Write a method that takes in the radius of a sphere and returns it's volume the formula is v=4/2*3.14*r^3"

I don't really get how to do this r^3 business I know I have to use pow(double base, double exp) but it is not working for me.

Here is my code so far.

Code:

`public class math()`

{

public double pow(double base, double exponent)

{

int v = (4/3)*3.14*pow;

return v;

}

}

The lab is due monday and I hope someone helps me by than. Thank you for your help in advice!