I just ran across this article telling about some new features in Google. Namely, that Google can now solve math equations, and do conversions.

Some Math Examples

• 1 + 1
Returns: 2
• 5 * (5 + 2) / 2
Returns: (5 * (5 + 2)) / 2 = 17.5

Some Conversion Examples

• 12 inches to centimeters
Returns: 12 inches = 30.48 centimeters
• speed of light to mph
Returns: the speed of light = 670 616 629 mph

Or, what we've all been yearning to know:

• What is the speed of light in furlongs per fortnight
the speed of light = 1.8026175 × 10¹² furlongs per fortnight

For more info, see Google's Calculator.