Solution - Simplification or other simple results

Step  1  :

            3
 Simplify   —
            4

Equation at the end of step  1  :

        7          3
  (0 -  —) • (0 -  —)
        9          4

Step  2  :

            7
 Simplify   —
            9

Equation at the end of step  2  :

        7    -3
  (0 -  —) • ——
        9    4 

Step  3  :

Final result :

   7           
  —— = 0.58333 
  12