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

### Instruction:
A school principal is booking hotel rooms for a class of 30 students to stay at during an overnight field trip.  Each of the hotel's rooms has two queen size beds, which can fit two students each, and a pull-out couch, which can fit one student.  How many rooms does the principal need to book to fit all of the students in the class?

### Response:
 แต่ละห้องสามารถรองรับนักเรียนได้ 2*2 + 1 = <<2*2+1=5>>5 คน
ดังนั้น ครูใหญ่จำเป็นต้องจองห้องพัก 30/5 = <<30/5=6>>6 ห้อง