Here's why:

* Meiosis I: Starts with one diploid cell (containing two sets of chromosomes) and divides it into two haploid cells (containing one set of chromosomes).

* Meiosis II: Each of the two haploid cells from Meiosis I divides again, producing a total of four haploid cells.

So, meiosis is a two-step process that ultimately creates four haploid cells, each with half the number of chromosomes as the original diploid cell.