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

### Instruction:
A notebook costs three times as much as a pen. If a pen costs $1.50, how much will Lyle pay for 4 notebooks?

### Response:
 สมุดโน้ตราคา $1.50 x 3 = $<<1.5*3=4.50>>4.50
ดังนั้นไลล์จะต้องจ่ายเงิน $4.50 x 4 = $<<4*4.50=18>>18 สำหรับสมุดโน้ต 4 เล่ม.