noob help

I am really new at programming anything, and taking a java class.

so i have a simple request:

What is the information i input to divide the sum of 3 numbers by their product?

this is what i have so far, probably waay off.


import java.util.*;

public class MyFirstProgram
{
    public static void main(String[] args)
    {
        System.out.println("Hello out there.");
        System.out.println("I will divide the sum of three numbers by thier product for you.");
        System.out.println("Enter three whole numbers on a line:");

        int n1, n2, n3, sum, product;

        Scanner keyboard = new Scanner(System.in);
        n1 = keyboard.nextInt( );
        n2 = keyboard.nextInt( );
        n3 = keyboard.nextInt( );
    sum = keyboard.nextInt(n1+n2+n3);
    product = keyboard.nextInt(n1*n2*n3);
       
        System.out.println("The sum of those three numbers is");
        System.out.println(sum/product);
      
}

}