Formula to make product of two negative numbers negative

Hi All,

I have a large dataset (24000 rows) that requires me to multiply two different columns of integers. In some cases, the two integers are both negative and multiplying them results in a product that is positive. I actually need that product to be negative rather than positive. I can't quite seem to figure out the best way to accomplish this.

Any ideas? I poked around the forum and web a bit and wasn't able to find anything dealing with this specific issue.

Thanks in advance for the help.

Cheers