Solution - Simplification or other simple results

Step  1  :

 1.1     81 = 34

(81)³ = (3⁴)³ = 3¹²

Equation at the end of step  1  :

Step  2  :

            312
 Simplify   ———
            14 

Final result :

  312               
  ——— = 37960.07143 
  14