Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "8.1" was replaced by "(81/10)".

Step  1  :

            81
 Simplify   ——
            10

Equation at the end of step  1  :

       81
  30 • ——
       10

Step  2  :

Final result :

  243