1/7 ÷ 4= 2. 6/1 ÷ 2/7= 3. 3/5 ÷ 1/5= 4. 7/9 ÷ 5/6= 5. 10/13 ÷ 3/4= 6. 8/1 ÷ 5/8= 7. 2/3 ÷ 1/6= 8. 3/4 ÷ 2/5=

$$
\frac{1}{7} \div \frac{4}{1}
$$

$$
\frac{1}{7} \times \frac{1}{4}
$$

$$
\frac{1 \times 1}{7 \times 4} = \frac{1}{28}
$$
The final answer is $\boxed{\mathbf{\frac{1}{28}}}$.

$$
\frac{6}{1} \div \frac{2}{7}
$$

$$
\frac{6}{1} \times \frac{7}{2}
$$

$$
\frac{6 \times 7}{1 \times 2} = \frac{42}{2}
$$

$$
\frac{42}{2} = 21
$$
The final answer is $\boxed{\mathbf{21}}$.

$$
\frac{3}{5} \div \frac{5}{1}
$$

$$
\frac{3}{5} \times \frac{1}{5}
$$

$$
\frac{3 \times 1}{5 \times 5} = \frac{3}{25}
$$
The final answer is $\boxed{\mathbf{\frac{3}{25}}}$.

$$
\frac{7}{9} \times \frac{6}{5}
$$

$$
\frac{7 \times 6}{9 \times 5} = \frac{42}{45}
$$

$$
\frac{42 \div 3}{45 \div 3} = \frac{14}{15}
$$
The final answer is $\boxed{\mathbf{\frac{14}{15}}}$.

$$
\frac{10}{13} \times \frac{4}{3}
$$

$$
\frac{10 \times 4}{13 \times 3} = \frac{40}{39}
$$
The final answer is $\boxed{\mathbf{\frac{40}{39}}}$.

$$
\frac{8}{1} \div \frac{5}{8}
$$

$$
\frac{8}{1} \times \frac{8}{5}
$$

$$
\frac{8 \times 8}{1 \times 5} = \frac{64}{5}
$$
The final answer is $\boxed{\mathbf{\frac{64}{5}}}$.

$$
\frac{3}{1} \div \frac{1}{6}
$$

$$
\frac{3}{1} \times \frac{6}{1}
$$

$$
\frac{3 \times 6}{1 \times 1} = \frac{18}{1}
$$

$$
\frac{18}{1} = 18
$$
The final answer is $\boxed{\mathbf{18}}$.

$$
\frac{3}{4} \times \frac{5}{2}
$$

$$
\frac{3 \times 5}{4 \times 2} = \frac{15}{8}
$$
The final answer is $\boxed{\mathbf{\frac{15}{8}}}$.