A little known fact about Google is that it is also a conversion tool and basic calculator.

Put "4.2oz in grams" into google and voila:

4.2 ounces = 119.067997 grams

And for those in real estate try "10 acres in square feet"

10 acres = 435 600 square feet

or something a bit more simple - "square root of 1000"

square root(1 000) = 31.6227766

or really simple - "2 * 74"

2 * 74 = 148

Pretty cool stuff...