Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.000000084" was replaced by "(000000084/1000000000)".

Step  1  :

                21   
 Simplify   —————————
            250000000

Equation at the end of step  1  :

      21   
  ————————— • m
  250000000

Step  2  :

Final result :

     21m   
  —————————
  250000000