Google Calculator - Google now has a built-in calculator that evaluates the search box and returns an answer. For instance, type 3 + 4 into google and press "Google Search". Google will come back with 3 + 4 = 7. You can get even more complicated - Google will do logarithms - log(3) = 0.477.... Google also handles units - what is 4 pounds added to 300 grams? Enter 4 lb + 300 g, Search, and Google returns "(4 pound) + (300 grams) = 2.11436948 kilograms".