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

### Instruction:
Stephen made 10 round trips up and down a 40,000 foot tall mountain. If he reached 3/4 of the mountain's height on each of his trips, calculate the total distance he covered.

### Response:
 40,000 ฟุต * 3/4 = <<40000*3/4=30000>>30,000 ฟุต
30,000 ฟุต * 10 = <<30000*10=300000>>300,000 ฟุต