To solve for \( w \) in the equation
\[ \frac{w}{-6} = -4, \]
you can begin by multiplying both sides of the equation by \(-6\) to isolate \( w \):
\[ w = -4 \times -6. \]
Calculating the right side gives:
\[ w = 24. \]
Therefore, the solution is
\[ \boxed{24}. \]