English - Idiom - A Piece of Cake

Idiom: A piece of cake
Meaning:  This idiom is used to describe a task, job or other activity that can be accomplished very easily, just like serving a slice of cake, very simple and pleasant.

Examples: 

• My homework is a piece of cake; I can finish it within an hour.
  
• Riding a bike is a piece of cake.
  

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