Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "^-2" was replaced by "^(-2)".

Step  1  :

 1.1     256 = 28

(256)^-2 = (2⁸)^(-2) = (2)^(-16)

Equation at the end of step  1  :

Step  2  :

          1       
 Divide  ———  by  4
         216      

Multiplying exponents :

 2.1    2¹⁶  multiplied by  2²   = 2^{(16 + 2)} = 2¹⁸

Final result :

   1                                   
  ——— = 3.81470 • 10-6 
  218