Solution - Simplification or other simple results

Step  1  :

             1
 Simplify   ——
            81

Equation at the end of step  1  :

  (1
 (——)1) ÷ 4
  81

Step  2  :

 2.1     81 = 3⁴ (81)¹ = (3⁴)¹ = 3⁴

Equation at the end of step  2  :

   1
  —— ÷ 4
  34

Step  3  :

          1      
 Divide  ——  by  4
         34      

Final result :

   1            
  ——— = 0.00309 
  324