How much is the taxi fare in Jeju Island?

I didn't pay attention to the starting price and mileage price, but it takes more than ten minutes from the airport to Jeju downtown hotel. It's only a few thousand won, and it shouldn't exceed five thousand. It's been a long time. I was surprised at the time. It's too cheap. Now I live more than 30 kilometers away from the airport. Generally, you can get to the airport in about 40 minutes and take a taxi for about 30 thousand.