Solution - Simplification or other simple results

Step  1  :

            7
 Simplify   —
            8

Equation at the end of step  1  :

  3   7
  — • —
  4   8

Step  2  :

            3
 Simplify   —
            4

Equation at the end of step  2  :

  3   7
  — • —
  4   8

Step  3  :

Final result :

  21           
  —— = 0.65625 
  32