Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "400." was replaced by "(400/1)".

Step  1  :

            400
 Simplify   ———
             1 

Equation at the end of step  1  :

  (400 • k) • g

Step  2  :

Final result :

  400kg