What is the origin of the idiom "a slice of the cake" and when to use it?

The idiom "a slice of the cake" has culinary origins and refers to the act of dividing a cake among multiple people. In the context of the idiom, it means to receive a portion or share of something, usually a desirable or beneficial resource or opportunity. The usage of the idiom has since expanded beyond its culinary origin and can now refer to any situation where someone is seeking a fair distribution of resources or benefits.