Solution - Simplification or other simple results

Step  1  :

            5
 Simplify   —
            7

Equation at the end of step  1  :

  4   5
  — • —
  9   7

Step  2  :

            4
 Simplify   —
            9

Equation at the end of step  2  :

  4   5
  — • —
  9   7

Step  3  :

Final result :

  20           
  —— = 0.31746 
  63