335. Найдите произведение: 1) \(\frac{2}{7} \cdot \frac{3}{5}\), 2) \(\frac{3}{5} \cdot \frac{5}{6}\), 3) \(\frac{4}{7} \cdot \frac{7}{9}\), 4) \(\frac{15}{16} \cdot \frac{48}{55}\), 5) \(\frac{22}{25} \cdot \frac{10}{77}\), 6) \(\frac{13}{24} \cdot \frac{16}{39}\), 7) \(\frac{6}{35} \cdot \frac{14}{15}\), 8) \(\frac{36}{85} \cdot \frac{34}{39}\)

1) \(\frac{2}{7} \cdot \frac{3}{5} = \frac{2 \cdot 3}{7 \cdot 5} = \frac{6}{35}\) 2) \(\frac{3}{5} \cdot \frac{5}{6} = \frac{3 \cdot 5}{5 \cdot 6} = \frac{3}{6} = \frac{1}{2}\) 3) \(\frac{4}{7} \cdot \frac{7}{9} = \frac{4 \cdot 7}{7 \cdot 9} = \frac{4}{9}\) 4) \(\frac{15}{16} \cdot \frac{48}{55} = \frac{15 \cdot 48}{16 \cdot 55} = \frac{3 \cdot 3}{1 \cdot 11} = \frac{9}{11}\) 5) \(\frac{22}{25} \cdot \frac{10}{77} = \frac{22 \cdot 10}{25 \cdot 77} = \frac{2 \cdot 2}{5 \cdot 7} = \frac{4}{35}\) 6) \(\frac{13}{24} \cdot \frac{16}{39} = \frac{13 \cdot 16}{24 \cdot 39} = \frac{1 \cdot 2}{3 \cdot 3} = \frac{2}{9}\) 7) \(\frac{6}{35} \cdot \frac{14}{15} = \frac{6 \cdot 14}{35 \cdot 15} = \frac{2 \cdot 2}{5 \cdot 5} = \frac{4}{25}\) 8) \(\frac{36}{85} \cdot \frac{34}{39} = \frac{36 \cdot 34}{85 \cdot 39} = \frac{12 \cdot 2}{5 \cdot 13} = \frac{24}{65}\)