8. Вычислите: \(10\frac{4}{7} \times 6\frac{14}{16}\).

\(10\frac{4}{7}=\frac{74}{7}\), \(6\frac{14}{16}=6\frac{7}{8}=\frac{55}{8}\).

\(\frac{74}{7}\times\frac{55}{8}=\frac{2035}{28}=72\frac{19}{28}\).

Ответ: \(72\frac{19}{28}\).