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

### Instruction:
Micah has 7 fish in his aquarium. Kenneth has three times as many fish in his aquarium and Matthias has 15 less fish than Kenneth in his aquarium. How many fish do the boys have in total?

### Response:
 เคนนีมีปลาอยู่ 7 x 3 = <<7*3=21>>21 ตัวในถังของเคนนี
มาทิอัสมีปลาอยู่ 21 - 15 = <<21-15=6>>6 ตัวในถังของมาทิอัส
ทั้งหมดเด็กๆมีปลา 7 + 21 + 6 = <<7+21+6=34>>34 ตัว