Perform the indicated operations involving the three rational expressions $$\frac{6xy^{4}}{3x^{2}} \cdot \frac{6xy^{6}}{22y} \div \frac{3y^{2}z^{2}}{11x^{4}}.$$ Express your answer in simplest form $\frac{A}{B}$.

Answer: $A =$ and $B =$