Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.6" was replaced by "(6/10)".

Step  1  :

            3
 Simplify   —
            5

Equation at the end of step  1  :

  3
  — • 1400
  5

Step  2  :

Final result :

  840