In meiotic division four daughter cells are produced.

Each of these four daughter cells contain half the number of chromosomes.

Meiotic division happen in reproductive cells such as pollen grains in plants and sperms in animals.

If one meiotic division produces four reproductive cells then :

250 meiotic divisions will produce :

250 × 4 = 1000 reproductive cells.

In this case pollen.

Meiotic divisions produce 1000 for special case as well as produce 1 pollen grain.

WE are taking about the formula for example + n/4 is for the number of meiosis for n grains.

However, the four daughter cells contain the half number of chromosomes with more reproductive cells such as pollen grains in the plants.