(2x 3 y2 3z)(3xyz4)3

(2x 3 y2 3z)(3xyz^4)^3

= (18xy^2z)(27x^3y^3z^12)
= 486x^4y^5z^13

(2x^3y^2 3z)(3xyz^4)^3
= 162x^6y^5z^13

Or something else, depending on how you have mangled the expression