8) \(3\frac{4}{9}\cdot(1\frac{5}{9}-\frac{4}{7})\)

\(3\frac{4}{9}=\frac{31}{9}\), \(1\frac{5}{9}=\frac{14}{9}\).

\(\frac{31}{9}\cdot\left(\frac{14}{9}-\frac{4}{7}\right)=\frac{31}{9}\cdot\frac{62}{63}=\frac{1922}{567}=3\frac{221}{567}\).

Ответ: \(3\frac{221}{567}\).