Solution - Simplification or other simple results

Step  1  :

            4
 Simplify   —
            9

Equation at the end of step  1  :

   5   4
  —— • —
  16   9

Step  2  :

             5
 Simplify   ——
            16

Equation at the end of step  2  :

   5   4
  —— • —
  16   9

Step  3  :

Final result :

   5           
  —— = 0.13889 
  36