Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "40.5" was replaced by "(405/10)".

Step  1  :

            18
 Simplify   ——
            5 

Equation at the end of step  1  :

  405   18
  ——— • ——
  10    5 

Step  2  :

            81
 Simplify   ——
            2 

Equation at the end of step  2  :

  81   18
  —— • ——
  2    5 

Step  3  :

                  81
 Divide  450  by  ——
                  2 

Equation at the end of step  3  :

  100   18
  ——— • ——
   9    5 

Step  4  :

Final result :

  40