a walk in the park

US /ə wɔk ɪn ðə pɑrk/
UK /ə wɔk ɪn ðə pɑrk/
"a walk in the park" picture
1.

小菜一碟, 輕而易舉

something that is very easy to do

:
Learning to ride a bike was a walk in the park for him.
學騎自行車對他來說是小菜一碟
Don't worry, this exam will be a walk in the park.
別擔心,這次考試會是小菜一碟