It is a piece of cake.It is no hassel (trouble)举手之劳
it's a piece of cake.
举手之劳，何足挂齿：That's nothing. Don't mention it.
举手之劳：a piece of cake九牛二虎：toil
举手之劳：a piece of cake 九牛二虎try one's best
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kevin咖啡馆
