a piece of cake
US /ə piːs əv keɪk/
UK /ə piːs əv keɪk/

1.
sangat mudah, senang saja
something that is very easy to do
:
•
The exam was a piece of cake; I finished it in half the time.
Peperiksaan itu sangat mudah; saya menyelesaikannya dalam separuh masa.
•
Learning to ride a bike was a piece of cake for him.
Belajar menunggang basikal sangat mudah baginya.