Pink Kangaroo 2019 Q24

The diagram shows triangle $JKL$ of area $S$. The point $M$ is the midpoint of $KL$. The points $P$, $Q$, $R$ lie on the extended lines $LJ$, $MJ$, $KJ$, respectively, such that $JP=2\times JL$, $JQ=3\times JM$ and $JR=4\times JK$.

What is the area of triangle $PQR$?