Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

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

Step  1  :

 1.1     20000 = 25•54

(20000)^-1 = (2⁵•5⁴)^(-1) = (2)^(-5) • (5)^(-4)

Final result :

     1              
  ——————— = 0.00005 
  (25•54)