Ben bir parça bagaj satın aldım. - I bought a piece of baggage.
Benim bir zarfa, bir parça kağıda ve kurşun kaleme ya da bir dolma kaleme ihtiyacım var. - I need an envelope, a piece of paper, and a pencil or a pen.
English - English
Definition of it's a piece of cake in English English dictionary
(Slang) it is very easy (e.g.: "My friend said that the test was hard but I found it was a piece of cake")