A specialized fluid has a kinematic viscosity of $20 \text{ centistokes (cSt)}$. Given that $1 \text{ St} = 10^{-4} \text{ m}^2/\text{s}$ and $1 \text{ cSt} = 0.01 \text{ St}$, what is the kinematic viscosity in $\text{mm}^2/\text{s}$?