Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.0025" was replaced by "(0025/10000)".

Step  1  :

             1 
 Simplify   ———
            400

Equation at the end of step  1  :

  21 
  ———
  400

Step  2  :

                  1 
 Divide  12  by  ———
                 400

Final result :

  4800