Suppose you wanted to know how many quarters per ounce?
You could start at Wikipedia (via Google of course Google searches Wikipedia much more effectively than Wikipedia). So. Courtesy of Wikipedia, you now know a quarter weighs 5.670 grams (forget the troy ounces, they're for the light in the loafers). Next step: ask Google what is 1 ounce / 5.670 grams. Um. I think the answer is five quarters to the ounce.
Now try it with Wolfram.
Sux.