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

### Instruction:
Corveus sleeps 4 hours a day and his doctor recommended for him to sleep 6 hours a day. How many hours of sleep does Corveus lack in a week?

### Response:
Corveus lacks 6 - 4 = <<6-4=2>>2 hours of sleep every day.
Therefore the total hours he lacks every week is 2 x 7 = <<2*7=14>>14.
#### 14