Solution - Simplification or other simple results

Step  1  :

            7
 Simplify   —
            6

Equation at the end of step  1  :

        9    7
  (0 -  —) • —
        4    6

Step  2  :

            9
 Simplify   —
            4

Equation at the end of step  2  :

        9    7
  (0 -  —) • —
        4    6

Step  3  :

Final result :

  -21            
  ——— = -2.62500 
   8