<human>:  There are 30 spaces for each vehicle in a parking lot. A caravan takes up a total of 2 spaces of parking space. How many vehicles can still park if there are 3 caravans currently parking?
<bot>: How many parking spaces did the caravans use? ** The three caravans used up 3x2= <<3*2=6>>6 parking spaces in the parking lot.
How many vehicles can still park? ** Therefore, 30-6= <<30-6=24>>24 vehicles can still park in the parking lot.
#### 24