The viscosity of an incompressible Newtonian fluid is measured using a capillary tube of diameter $0.5 \mathrm{~mm}$ and length $1.5 \mathrm{~m}$. The fluid flow is laminar, steady and fully developed. For a flow rate of $1 \mathrm{~cm}^3 \mathrm{~s}^{-1}$, the pressure drop across the length of the tube is $1 \mathrm{~MPa}$. If the viscosity of the fluid is $\boldsymbol{k} \times \mathbf{1 0}^{-\mathbf{3}} \mathrm{~Pa}$. s, the value of $\boldsymbol{k}$ is______________(rounded off to two decimal places).