A metallic spherical particle of density $7001 \mathrm{~kg} \mathrm{~m}^{-3}$ and diameter $1 \mathrm{~mm}$ is settling steadily due to gravity in a stagnant gas of density $1 \mathrm{~kg} \mathrm{~m}^{-3}$ and viscosity $10^{-5} \mathrm{~kg} \mathrm{~m}^{-1} \mathrm{~s}^{-1}$. Take $g=9.8 \mathrm{~m} \mathrm{~s}^{-2}$. Assume that the settling occurs in the regime where the drag coefficient $C_{D}$ is independent of the Reynolds number, and equals $0.44$. The terminal settling velocity of the particle, in $\mathrm{m} \mathrm{s}^{-1}$, rounded off to $2$ decimal places, is $\_\_\_\_\_\_\_\_\_$