Excel Formula Help Needed Again

[hlewton]

I have a cell in Excel that will eventually equal a minus number. The cell is actually D10. Is there a formula I can place in another cell, maybe D50, that takes to minus number, whatever it may be, and multiply it by 40 and make that a positive number? For instance, if the minus number is 10, multiply it by 40 and have a positive number of 400 shown id cell D50. Also, can the cell be blank until cell D10 has a negative value in it?

Thanks

[HansV]

=IF(D10<0, -40*D10, "")

[hlewton]

=IF(D10<0, -40*D10, "")

Awe, I believe that is multiplying 2 minuses to get a plus. I just have been away from doing math for toooooooo many years. Thank you.