数学1入門1-3想定問題3

3. 分数の乗除算

$$
\frac{2}{7} \times {3} = \\
5 \times \frac{2}{3} = \\
\frac{8}{11} \div{4} = \\
6 \div \frac{3}{2} = \\
\\
\frac{7}{8} \times \frac{2}{14} = \\
\frac{5}{12} \times \frac{3}{4} = \\
\frac{2}{7} \div \frac{10}{21} = \\
$$