Reporter David Kestenbaum investigates the new pop fascination with math. It's taking root in Hollywood movies like "Good Will Hunting," where the hero conquers differential equations instead of alien robots or terrorists. You can even buy a new men's cologne called "Pi" after the mathematical ratio 3.14 that we all learned in school and promptly forgot. The trend toward "math is cool" comes even as math performance by American students continues to decline. Why now? Go figure.