Let the equations of two adjacent sides of a parallelogram $\mathrm{ABCD}$ be $2 x-3 y=-23$ and $5 x+4 y=23$. If the equation of its one diagonal $\mathrm{AC}$ is $3 x+7 y=23$ and the distance of A from the other diagonal is $\mathrm{d}$, then $50 \mathrm{~d}^{2}$ is equal to ____________.