2. The incircle of $\triangle A B C$ touches sides $A B, B C, C A$ at $D, E, F$ respectively. The incircle of $\triangle D E F$ touches sides $D E, E F, F D$ at $P, Q, R$ respectively. Given that $\triangle A B C \backsim \triangle P Q R$, and the perimeter of $\triangle P Q R$ is 3. Then the area of $\triangle A B C$ is
$2.4 \sqrt{3}$