Solution - Simplification or other simple results

Step  1  :

            4
 Simplify   —
            1

Equation at the end of step  1  :

     81               
  (((—— • 5) -  4) +  4) • 2
     3                

Step  2  :

            27
 Simplify   ——
            1 

Equation at the end of step  2  :

  (((27 • 5) -  4) +  4) • 2

Step  3  :

Final result :

  270