We first have to convert to the same units. Let’s use grams.

The prefix k- (kilo) means 1000, so

##2.50 kg=2.50*1000g=2500 g##

The prefix m- (milli) means 1/1000, so

##325 mg=(325/1000)g=0.325 g##

Now divide: ##2500/0.325=7692.3..~~7692## tablets.