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

### Instruction:
 一所当地高中有500名学生。其中40%是大三学生。大三学生中有70%参与体育运动。有多少名大三学生参与体育运动？


### Response:
 大三学生:500(.40)=200
参与体育运动的大三学生:200(.70)=140名学生