Find the area of the surface of the half cylinder $((r,\theta,z): r = 3, 0 \le \theta \le \pi, 0 \le z \le 9)$ using a parametric description of the\nsurface.\nSet up the integral for the surface area using the parameterization $u = \theta$ and $v = z$.\n$\int_{0}^{\pi} \int_{0}^{9} (\text{ }) du dv$\n(Type an exact answers, using $\pi$ as needed.)\nThe surface area is $\boxed{ }$.\n(Type an exact answer, using $\pi$ as needed.)