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)".

(2): "4.2" was replaced by "(42/10)".

Step  1  :

 1.1     10 = 2•5

(10)^-1 = (2•5)^(-1) = (2)^(-1) • (5)^(-1)

Equation at the end of step  1  :

  42
  —— • ((2)(-1)•(5)(-1))
  10

Step  2  :

            21
 Simplify   ——
            5 

Equation at the end of step  2  :

  21
  —— • ((2)(-1)•(5)(-1))
  5 

Step  3  :

Multiplying exponents :

 3.1    5¹  multiplied by  5¹   = 5^{(1 + 1)} = 5²

Final result :

  21           
  —— = 0.42000 
  50