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

### Instruction:
 苏茜家里有很多灰尘。她花2小时来吸尘整个房子。她可以在20分钟内吸尘每个房间。她家有多少个房间？


### Response:
 苏茜花了2*60 = <<2*60=120>>120分钟来吸尘。
如果她每个房间需要20分钟来吸尘，那么她家有120/20 = <<120/20=6>>6个房间。