An $\text{OPAMP}$ has a gain of $10^{4},$ an input impedance of $10 \; \text{M} \Omega$ and an output impedance of $100 \; \Omega.$ The $\text{OPAMP}$ is used in unity-gain feedback configuration in a voltage buffer circuit. The closed-loop output impedance of the $\text{OPAMP}$ (in milliohms) in the circuit is ___________ (round off to one decimal place)