Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "d2"   was replaced by   "d^2". 

(2): "0.842" was replaced by "(842/1000)".

Step  1  :

            421
 Simplify   ———
            500

Equation at the end of step  1  :

               421
  ((d2) • f) • ———
               500

Step  2  :

Final result :

  421d2f
  ——————
   500