Some Basic Concepts of Chemistry

The density of '$x$' $\mathrm{M}$ solution ('$x$' molar) of $\mathrm{NaOH}$ is $1.12 \mathrm{~g} \mathrm{~mL}^{-1}$, while in molality, the concentration of the solution is $3 \mathrm{~m}$ ( 3 molal). Then $x$ is (Given : Molar mass of $\mathrm{NaOH}$ is $40 \mathrm{~g} / \mathrm{mol}$)