举手之劳的英文如何说呀？

举手之劳，何足挂齿：That's nothing.
Don't mention it.

最正宗的,最美国的表达应该是
No trouble at all, it's a sheer pleasure actually

it's a pleasure.
it's my pleasure.

it's a piece of cake

with ease.
比如：做这事儿是举手之劳。
I did it with ease.

it's a piece of cake.