Please answer this riddle!?

[Hello. (:]

Depends how many babies they birth from all that action.

 

[Jonathan B]

if there are 6 elephants on the top, 2 elephants in the middle, and 5 elephants on the bottom, how many elephants are there in all?
ok, i got that the answer is 7, but why?

 

[Super]

6 2 and 5 is 13 but im guessing theres some trick