Change of Variables & the Jacobian · Easy problem

In spherical coordinates $x = \rho\sin\phi\cos\theta$, $y = \rho\sin\phi\sin\theta$, $z = \rho\cos\phi$, the Jacobian determinant is $\dfrac{\partial(x,y,z)}{\partial(\rho,\phi,\theta)} = \rho^2\sin\phi$. Evaluate it at $\rho = 3$, $\phi = \dfrac{\pi}{6}$.