Coordinate Geometry: JEE Main 2024 Mathematics question

Suppose $\mathrm{AB}$ is a focal chord of the parabola $y^2=12 x$ of length $l$ and slope $\mathrm{m}<\sqrt{3}$. If the distance of the chord $\mathrm{AB}$ from the origin is $\mathrm{d}$, then $l \mathrm{~d}^2$ is equal to _________.