Questions & Answers about Daar is ongeveer drie vlooie.
Here daar does not mainly refer to a location. In Daar is ongeveer drie vlooie, it works like English there in There are about three fleas.
This use is called existential daar: it introduces the existence of something.
- Daar is 'n hond. = There is a dog.
- Daar is twee kinders. = There are two children.
So in this sentence, daar is means there is/there are, not over there is.