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

### Instruction:
There are twice as many centipedes as humans on a certain island and half as many sheep as humans. How many sheep and humans in total are on the island if the number of centipedes is 100?

### Response:
 จำนวนคนบนเกาะคือ 100 / 2 = <<100/2=50>>50 คน
มีแกะบนเกาะ 1/2 * 50 = <<1/2*50=25>>25 ตัว
จำนวนแกะและคนทั้งหมดคือ 25 + 50 = <<25+50=75>>75 ตัว