<human>:  There are 80 passengers on the airplane where the number of men and women is equal. The rest of the passengers are children. How many children are on the airplane if there are 30 men?
<bot>: How many men and women are there? ** Since the number of men and women is equal, then there are a total of 30 + 30 = <<30+30=60>>60 men and women.
How many children are on the airplane? ** Thus, 80 - 60 = <<80-60=20>>20 children are on the airplane.
#### 20