It’s a piece of cake小菜一碟

It's a piece of cake

It’s a piece of cake小菜一碟

I guess it’s a piece of cake for you.

我想这对你来说就是小菜一碟。

A:I can’t believe you solve this math problem in 30 seconds.

我不敢相信你30秒就解出了这道数学题。

B:Well,It’s a piece of cake.

小菜一碟。

Learn Chinese Idioms – Without loophole