## Calculus (3rd Edition)

$$27$$
Since $f(x,y)$ is continuous at $(2,3)$, then we have $$f(2,3)=\lim\limits_{(x,y) \to (2,3)}f(x,y)=\lim\limits_{(x,y) \to (2,3)}y^3=3^3=27.$$