Multiplication of algebraic fractions: $\frac{a}{b} \cdot \frac{c}{d} = \frac{ac}{bd}$

Got it !

$\frac{a}{2b} \cdot \frac{b}{a} =$ $\frac{ab}{2ab} = \frac{1}{2}$
$\frac{a}{6b} \cdot \frac{3b}{4} =$ $\frac{3ab}{24b} = \frac{a}{8}$
$\frac{4x^2-6xy}{5x} \cdot \frac{10x}{6x-9y} =$