Find the area of a parallelogram formed by the vectors PQ\displaystyle \vec{{{P}{Q}}} and PR\displaystyle \vec{{{P}{R}}}, where P=(6,6,6)\displaystyle {P}={\left(-{6},-{6},-{6}\right)}, Q=(5,2,4)\displaystyle {Q}={\left(-{5},{2},{4}\right)} and R=(1,6,5)\displaystyle {R}={\left(-{1},-{6},-{5}\right)}.