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

### Instruction:
Mark is looking to buy a total of 12 pieces of fruit at the store. He has already chosen 3 apples. He has also selected a bunch of bananas containing 4 bananas. How many oranges does he need to pick out to have 12 total pieces of fruit?

### Response:
 กล้วยหอมนับเป็น 1 ชิ้นของผลไม้เพราะ 1 x 4 = <<1*4=4>>4
เขามีผลไม้ทั้งหมด 5 ชิ้นเพราะ 3 + 4 = <<3+4=7>>7
เขาต้องเลือกส้มอีก 5 ลูกเพราะ 12 - 7 = <<12-7=5>>5