To solve for \( a \) in the equation \( -14 = 4a \), follow these steps:
- Divide both sides of the equation by 4:
\[ a = \frac{-14}{4} \]
- Simplify the fraction:
\[ a = \frac{-14 \div 2}{4 \div 2} = \frac{-7}{2} \]
Thus, the fully simplified form of \( a \) is:
\[ \boxed{-\frac{7}{2}} \]