If the conductivity of mercury at $0^{\circ} \mathrm{C}$ is $1.07 \times 10^6 \mathrm{~S} \mathrm{~m}^{-1}$ and the resistance of a cell containing mercury is $0.243 \Omega$, then the cell constant of the cell is $\times 104 \mathrm{~m}-1$. The value of $x$ is $\_\_\_\_$ (Nearest integer)
