334. Выполните умножение: 1) \(\frac{9}{35}\cdot 8\); 2) \(\frac{7}{24}\cdot 16\); 3) \(42 \cdot \frac{4}{7}\); 4) \(\frac{6}{19}\cdot 57\).

1) \(\frac{9}{35}\cdot 8 = \frac{9 \cdot 8}{35} = \frac{72}{35} = 2\frac{2}{35}\)

2) \(\frac{7}{24}\cdot 16 = \frac{7 \cdot 16}{24} = \frac{7 \cdot 2}{3} = \frac{14}{3} = 4\frac{2}{3}\)

3) \(42 \cdot \frac{4}{7} = \frac{42 \cdot 4}{7} = 6 \cdot 4 = 24\)

4) \(\frac{6}{19}\cdot 57 = \frac{6 \cdot 57}{19} = 6 \cdot 3 = 18\)

Ответ: 1) \(2\frac{2}{35}\); 2) \(4\frac{2}{3}\); 3) 24; 4) 18