It never ceases to amaze me what the good folks at Google are doing. Most people I know are very familiar with their [global search portal](http://google.com), but did you know that you can use the tool as a simple desktop calculator and currency converter as well?
Here’s an example. Image you need to add a couple of figures in Euro, apply some discount and then convert the result to US dollar. It’s really simple, here’s how it is done: