Molarity $(\mathrm{M})$ of an aqueous solution containing $x \mathrm{~g}$ of anhyd. $\mathrm{CuSO}_4$ in $500 \mathrm{~mL}$ solution at $32^{\circ} \mathrm{C}$ is $2 \times 10^{-1} \mathrm{M}$. Its molality will be _________ $\times 10^{-3} \mathrm{~m}$. (nearest integer). [Given density of the solution $=1.25 \mathrm{~g} / \mathrm{mL}$]