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

### 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:
 Él subió y bajó la montaña 10 veces.
Subió 3/4 de la altura de la montaña cada vez, así que 3/4 * 40,000 = <<3/4*40000=30,000>>30,000 pies.
Subió y bajó la montaña 10 veces, así que 30,000 * 10 = <<30,000*10=300,000>>300,000 pies.