#Java 7, 39 bytes

    int c(int a,int b){return a*~a*b*~b/4;}

#Java 8, <s>26</s> <s>25</s> 17 bytes

    (a,b)->a*~a*b*~b/4;

Based on [*@xnor*'s excellent answer](http://codegolf.stackexchange.com/a/87191/52210). Multiple bytes saved thanks to *@DavidConrad*.

**Ungolfed & test cases (Java 7):**

[Try it here.](https://ideone.com/90RbCD)

    class Main{
      static int c(int a, int b){
        return a * ~a * b * ~b / 4;
      }
    
      public static void main(String[] a){
        System.out.println(c(0, 0));
        System.out.println(c(1, 1));
        System.out.println(c(3, 3));
        System.out.println(c(4, 4));
        System.out.println(c(6, 7));
      }
    }

**Output:**

    0
    1
    36
    100
    588