Solution - Simplification or other simple results

Step  1  :

 1.1     81 = 34

(81)¹ = (3⁴)¹ = 3⁴

Equation at the end of step  1  :

Step  2  :

            34
 Simplify   ——
            4 

Final result :

  81            
  —— = 20.25000 
  4