Calculations in the field $\mathbb{F}_{13}$

Question

The text i am reading claims that $\frac{246}{14}=1$ in the field $\mathbb{F}_{13}$. However, i cannot figure out why this is correct. Since $13 \cdot 18 = 234 \Rightarrow 246 = 12$ and $14 = 1$. How is $12 = 1$ in $\mathbb{F}_{13}$? I appreciate the help.