这道数学题对他来说是小菜一碟。Zhè dào shùxué tí duì tā lái shuō shì xiǎocài yìdié.This maths problem is a piece of cake for him.
你放心,搬这几个箱子对我来说小菜一碟。Nǐ fàngxīn, bān zhè jǐ ge xiāngzi duì wǒ lái shuō xiǎocài yìdié.Don't worry, moving these few boxes is a piece of cake for me.
别担心,做一顿饭对他来说简直是小菜一碟。Bié dānxīn, zuò yí dùn fàn duì tā lái shuō jiǎnzhí shì xiǎocài yìdié.Don't worry, cooking a meal is simply a piece of cake for him.