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

### Instruction:
John has 3 children. He and his wife are supposed to buy notebooks for their sons but they couldn't agree on how many to buy. So John bought 2 notebooks for each of his children and John's wife bought 5 notebooks for each of them. How many notebooks did they buy in total for their children?

### Response:
 จอห์นซื้อสมุดโน้ต 2 เล่มสำหรับลูก 3 คน ดังนั้นเขาซื้อ 2*3 = <<2*3=6>>6 เล่ม
ภรรยาของจอห์นซื้อสมุดโน้ต 5 เล่มสำหรับลูก 3 คน ดังนั้นเธอซื้อ 5*3 = <<5*3=15>>15 เล่ม
ตอนนี้จำนวนสมุดโน้ตทั้งหมดคือ 15+6 = <<15+6=21>>21 เล่ม