а) \(\frac{5}{6} \cdot 3 = \frac{5 \cdot 3}{6} = \frac{15}{6} = \frac{5}{2} = 2\frac{1}{2}\)
б) \(\frac{16}{21} \cdot 14 = \frac{16 \cdot 14}{21} = \frac{16 \cdot 2}{3} = \frac{32}{3} = 10\frac{2}{3}\)
Ответ: а) \(2\frac{1}{2}\); б) \(10\frac{2}{3}\)