Solution - Simplification or other simple results

Step  1  :

            4
 Simplify   —
            5

Equation at the end of step  1  :

   1   18    4
  (— • ——) • —
   6   64    5

Step  2  :

             9
 Simplify   ——
            32

Equation at the end of step  2  :

   1    9    4
  (— • ——) • —
   6   32    5

Step  3  :

            1
 Simplify   —
            6

Equation at the end of step  3  :

   1    9    4
  (— • ——) • —
   6   32    5

Step  4  :

Final result :

   3           
  —— = 0.03750 
  80