в) $$ 2 \frac{2}{8} \cdot 2 \frac{5}{2} \cdot 2 \frac{2}{7} = \frac{18}{8} \cdot \frac{9}{2} \cdot \frac{16}{7} = \frac{18 \cdot 9 \cdot 16}{8 \cdot 2 \cdot 7} = \frac{2592}{112} = \frac{324}{14} = \frac{162}{7} = 23 \frac{1}{7} $$
Ответ: $$23 \frac{1}{7}$$