в) $$9 \cdot 4\frac{1}{6} = \frac{9}{1} \cdot \frac{1}{6} =$$

в) $$9 \cdot 4\frac{1}{6} = \frac{9}{1} \cdot \frac{25}{6} = \frac{9 \cdot 25}{1 \cdot 6} = \frac{3 \cdot 25}{1 \cdot 2} = \frac{75}{2} = 37\frac{1}{2}$$