4. Найдите произведение: a) \(10 \cdot \frac{5}{8}\); б) \(\frac{1}{6} \cdot 47\)

a) \(10 \cdot \frac{5}{8} = \frac{10 \times 5}{8} = \frac{50}{8} = \frac{25}{4} = 6 \frac{1}{4}\) б) \(\frac{1}{6} \cdot 47 = \frac{47}{6} = 7 \frac{5}{6}\)