1. 小事一桩：Ill just pay them a visit 我会去看看的. | piece of cake 小事一桩. | enjoy the show 享受烟火吧.

2. 易如反掌：12. Thank a lot ! 非常感谢 | 13. Piece of cake! 易如反掌 | 14. You are welcome ! 别客气

3. 非常容易的事：piece goods 匹头 | piece of cake 非常容易的事 | piece rate 计件工资

4. 小意思：Core loaded.|内核装载 | Piece of cake.|小意思 | HECKLER: Activate weapon drones.|启动无人机攻击

noun

1. any undertaking that is easy to do

e.g. marketing this product will be no picnic

Synonym: cinchbreezepicnicsnapduck soupchild's playpushoverwalkover