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

### Instruction:
Toby is counting goldfish in the local pond. He knows that only 25% of goldfish are at the surface and the rest are too deep below the surface to be able to see. If he counts 15 goldfish, how many are below the surface?

### Response:
 มีปลาทองทั้งหมด 60 ตัวเพราะ 15 / .25 = <<15/.25=60>>60
มีปลาทองที่อยู่ใต้ผิวน้ำ 45 ตัวเพราะ 60 x .75 = <<60*.75=45>>45