How do you divide fractions? Show your work for 12/4 divided by 2/14.

The reciprocal of $\frac{2}{14}$ is $\frac{14}{2}$.

$$\frac{12}{4} \div \frac{2}{14} = \frac{12}{4} \times \frac{14}{2}$$

We can simplify 12 and 2 by dividing both by 2.
We can simplify 14 and 4 by dividing both by 2.

$$\frac{12^{\div 2}}{4} \times \frac{14}{2^{\div 2}} = \frac{6}{4} \times \frac{14}{1}$$

Now, simplify 6 and 4 by dividing both by 2:

$$\frac{6^{\div 2}}{4^{\div 2}} \times \frac{14}{1} = \frac{3}{2} \times \frac{14}{1}$$

Finally, simplify 14 and 2 by dividing both by 2:

$$\frac{3}{2^{\div 2}} \times \frac{14^{\div 2}}{1} = \frac{3}{1} \times \frac{7}{1}$$

$$\frac{3}{1} \times \frac{7}{1} = \frac{3 \times 7}{1 \times 1} = \frac{21}{1} = 21$$

The final answer is $\text{21}$.