Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 Haleigh需要为她的宠物买紧身裤。她有4只狗和3只猫。她需要多少双紧身裤？


### Response:
 她有4+3 = <<4+3=7>>7只宠物
它们需要7*2 = <<7*2=14>>14双紧身裤