Решение:

1. $$\frac{3}{8} \cdot \frac{1}{6} = \frac{3 \cdot 1}{8 \cdot 6} = \frac{3}{48} = \frac{1}{16}$$
2. $$\frac{4}{9} \cdot \frac{5}{6} = \frac{4 \cdot 5}{9 \cdot 6} = \frac{20}{54} = \frac{10}{27}$$
3. $$\frac{2}{7} \cdot \frac{9}{14} = \frac{2 \cdot 9}{7 \cdot 14} = \frac{18}{98} = \frac{9}{49}$$

Ответ:

• $$\frac{3}{8} \cdot \frac{1}{6} = \frac{1}{16}$$
• $$\frac{4}{9} \cdot \frac{5}{6} = \frac{10}{27}$$
• $$\frac{2}{7} \cdot \frac{9}{14} = \frac{9}{49}$$