Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.9" was replaced by "(9/10)". 2 more similar replacement(s)

Step  1  :

             9
 Simplify   ——
            10

Equation at the end of step  1  :

  42    9
  —— • ——
  10   10

Step  2  :

            21
 Simplify   ——
            5 

Equation at the end of step  2  :

  21    9
  —— • ——
  5    10

Step  3  :

Final result :

  189           
  ——— = 3.78000 
  50