Solution - Simplification or other simple results

Step  1  :

            1
 Simplify   —
            6

Equation at the end of step  1  :

  4   1
  — • —
  5   6

Step  2  :

            4
 Simplify   —
            5

Equation at the end of step  2  :

  4   1
  — • —
  5   6

Step  3  :

Final result :

   2           
  —— = 0.13333 
  15