Ответ:\(\frac{5}{14}\cdot28=5\cdot2=10\).\(2\frac{2}{15}\cdot1\frac{9}{16}=\frac{32}{15}\cdot\frac{25}{16}=\frac{10}{3}=3\frac{1}{3}\).Ответ: 3) 10; 5) \(3\frac{1}{3}\).