For example, tell me:
* Are you asking about Santa's reindeer? There are nine of those: Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner, Blitzen, and Rudolph.
* Are you asking about a specific herd of reindeer? Tell me how many are in the herd!
* Are you asking about a specific scenario? For example, "There are 3 reindeer in the forest, and 2 more come along. How many reindeer are there in all?"
Once you give me more information, I can tell you how many reindeer there are in all!