Solution - Power equations

Step  1  :

 1.1     256 = 28

(256)³ = (2⁸)³ = 2²⁴

Equation at the end of step  1  :

Step  2  :

            224
 Simplify   ———
             8 

Dividing exponents :

 2.1    2²⁴   divided by   2³   = 2^{(24 - 3)} = 2²¹

Final result :

  221