It's a piece of cake.
小菜一碟。
It's a piece of cake"表示某件事非常简单，容易做到，相等于中文里的“小菜一碟”。用于描述不费力就可以完成的工作或任务，表达轻松自如的心情。
示例句子
Don't worry about the exam, it's a piece of cake.
不用担心考试，这很简单。
You'll find the job easy, it's a piece of cake.
你会发现这份工作很简单。
Setting up the computer was surprisingly easy, it's a piece of cake, really!
设置电脑意外地简单，真的很简单！
