Examples:

• It's a piece of cake compared to my job this morning.
• This job is gonna be a piece of cake.
• The lady was right, this is a piece of cake.
• Rest easy, maintaining the X5 is a piece of cake.
• This little ride would be a piece of cake for him.
• Unique dimensions or unique features are a piece of cake.
• So, to him, this is just a piece of cake.
• Okay, don't worry, this will be a piece of cake.
• Yeah, and everything else has been a piece of cake.
• I tried a piece of cake and it was delicious.