<human>:  The number of students who wish to go on a skiing trip is twice as many as those who wish to go on a scavenger hunting trip. If there are 4000 students who wish to go on the scavenger hunting trip, how many students are there altogether?
<bot>: How many students are there who wish to go on the skiing trip? ** The number of students who wish to go on the skiing trip is 2 * 4000 students = <<2*4000=8000>>8000 students.
How many students are there altogether? ** The total number of students is 4000 students + 8000 students = <<4000+8000=12000>>12000 students.
#### 12000