The parent container below has a fixed height (`h-64`). The child element uses `w-full` and `h-full` to fill the parent completely.
Parent (w-3/4, h-64)
w-full
: Makes an element take up 100% of its parent's width.
h-full
: Makes an element take up 100% of its parent's height, IF the parent has a defined height.
h-64
: An arbitrary height utility to define the parent's height.