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

### Instruction:
 金在学校上4门课，每门课持续2小时。她退掉了1门课。现在她每天上多少小时的课？


### Response:
 现在她上3门课。
所以她在学校待了3*2=<<3*2=6>>6小时。