Solution - Simplification or other simple results

Step  1  :

 1.1     243 = 35

(243)⁸ = (3⁵)⁸ = 3⁴⁰

Equation at the end of step  1  :

  9 • 340

Step  2  :

Multiplying exponents :

 2.1    3²  multiplied by  3⁴⁰   = 3^{(2 + 40)} = 3⁴²

Final result :

  342