Region with holes, not simply-connected.

Multiply diagonally, equate the products.

In mathematics, a multiply perfect number (also called multiperfect number or pluperfect number) is a generalization of a perfect number.

In Judaism, Christianity, and some other Abrahamic religions, the commandment to "be fruitful and multiply" (referred to as the "creation mandate" in some denominations of Christianity) is the divine injunction which forms part of Genesis 1:28, in which God, after having created the world and all in it, ascribes to humankind the tasks of filling, subduing, and ruling over the earth.