Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.00000084" was replaced by "(00000084/100000000)".

Step  1  :

               21   
 Simplify   ————————
            25000000

Equation at the end of step  1  :

     21   
  ———————— • 100000
  25000000

Step  2  :

Final result :

   2100000           
  ———————— = 0.08400 
  25000000