You can
put this solution on YOUR website!A negative times a positive is always a negative.
A positive times a negative is always a positive.
A negative times a negative is always a positive.
Now if you know that, you can plug it to a calculator to get your answer. Even if the calculator cannot give the correct sign (as is the case in some calculators, or you can't get it put into the calculator in the mannor it wants) You can at least get the correct answer and then from your knowledge of the three above rules, you will know if it is neg or pos.