Google Calculator hidden feature in search

A cool Google Secret  Google Calculator a hidden feature in search 



Google Calculator is a hidden feature of Google search. You can type math expressions, unit conversions and many other questions that have a unique answer.

Its interesting, try :
32+2345*3-234=
Answer:6833
How many seconds in a decade?
Answer: 315 569 260 seconds
17 to binary
Answer: 0b10001
e^((pi)*i)+1
Answer: 0
10th root of 1024
Answer: 2
When is Easter 2006?
Answer:
(Western) April 16, 2006
(Orthodox) April 23, 2006
Earth mass in kg
Answer: 5.9742 × 1024 kilograms.
You can also find a simple keyboard interface for the Google Calculator here.