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

### Instruction:
John buys 5 notebooks that have 40 pages each.  He uses 4 pages per day.  How many days do the notebooks last?

### Response:
 เขาได้รับ 5 x 40 = <<5*40=200>>200 หน้า
ดังนั้นสมุดโน้ตจะเหลืออีก 200/4 = <<200/4=50>>50 วัน