What do you get when you multiply a negative number by a positive number?

The product of a negative number and a positive number is always negative.

Here's something funny my math teacher once told us to help us remember.

Good thing happening to a Good person = Good
positive x positive = positive

Bad thing happening to a Good person = Bad
negative x positive = negative

Good thing happening to a Bad person = Bad
positive x negative = negative

Bad thing happening to a Bad person = Good
negative x negative = positive