\(\boxed{\mathbf{2.}\mathbf{302}\mathbf{.\ ОК\ ГДЗ - домашка\ на\ }5}\)
\[\textbf{а)}\ \frac{14}{17} \cdot \frac{34}{63} = \frac{14 \cdot 34}{17 \cdot 63} = \frac{2 \cdot 2}{9} = \frac{4}{9}\]
\[\textbf{б)}\ \ \frac{35}{8} \cdot \frac{16}{7} = \frac{35 \cdot 16}{8 \cdot 7} = 5 \cdot 2 =\]
\[= 10\]
\[\textbf{в)}\ \frac{51}{103} \cdot \frac{103}{119} = \frac{51 \cdot 103}{103 \cdot 119} = \frac{3}{7}\]
\[\textbf{г)}\ \frac{4}{15} \cdot \frac{30}{49} \cdot \frac{7}{8} = \frac{4 \cdot 30 \cdot 7}{15 \cdot 49 \cdot 8} =\]
\[= \frac{1 \cdot 2 \cdot 1}{1 \cdot 7 \cdot 2} = \frac{1}{7}\]
\[\textbf{д)}\ 24 \cdot \frac{11}{48} = \frac{24 \cdot 11}{48} = \frac{11}{2} = 5\frac{1}{2}\]
\[\textbf{е)}\ 6 \cdot 3\frac{5}{6} = 6 \cdot \frac{23}{6} = \frac{6 \cdot 23}{6} = 23\]
\[\textbf{ж)}\ 3\frac{5}{14} \cdot 7 = \frac{47 \cdot 7}{14} = \frac{47}{2} = 23\frac{1}{2}\]
\[\textbf{з)}\ 5\frac{4}{45} \cdot 9 \cdot 15 =\]
\[= \frac{229 \cdot 3 \cdot 3 \cdot 15}{45} = 687\]