Just a piece of cake意思

"Just a piece of cake" is an English idiom that means something is very easy or simple to do. The phrase is often used to describe a task or situation that presents no difficulty, similar to saying "It's a piece of cake" or "It's as easy as pie." Here's an example of how it might be used in a conversation:

Person A: "How was your exam today?" Person B: "It was just a piece of cake! I knew all the material already, so it was really easy."

In this context, Person B is saying that the exam was very simple and not challenging at all.