2. Let the points dividing the sides $BC$, $CA$, and $AB$ of $\triangle ABC$ internally in the ratio $t:(1-t)$ be $P$, $Q$, and $R$, respectively. The area of the triangle formed by the segments $AP$, $BQ$, and $CR$ is $K$, and the area of $\triangle ABC$ is $L$. Find $\frac{K}{L}$.
$t^{2}-t+1$