ˋㄖㄨˊㄈㄢˇㄓㄤˇyìrúfǎnzhǎng

  1. 手掌那樣容易比喻事情非常容易 文章翻譯簡直易如反掌」。

easy as a hand's turn (idiom)​; very easy, no effort at all
kinderleicht