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

### Instruction:
A third of the contestants at a singing competition are female, and the rest are male. If there are 18 contestants in total, how many of them are male?

### Response:
 มีผู้เข้าแข่งขันเพศหญิง 18/3 = <<18/3=6>>6 คน
มีผู้เข้าแข่งขันเพศชาย 18-6 = <<18-6=12>>12 คน