Solution - Simplification or other simple results

Step  1  :

 1.1     4 = 22

(4)³ = (2²)³ = 2⁶

Equation at the end of step  1  :

Step  2  :

            26
 Simplify   ——
            5 

Final result :

  64            
  —— = 12.80000 
  5