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