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

### Instruction:
John is working as an IT specialist. He repairs broken computers. One day he had to fix 20 computers. 20% of them were unfixable, and 40% of them needed to wait a few days for spare parts to come. The rest John was able to fix right away. How many computers John was able to fix right away?

### Response:
 จากเครื่องคอมพิวเตอร์ทั้งหมด 100% - 40% - 20% = 40% ได้รับการซ่อมทันที
ดังนั้นจอห์นสามารถซ่อมได้ 20 * 40%/100% = <<20*40/100=8>>8 เครื่อง