IPython 0.10 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: from __future__ import division

In [2]: 1680/1400*175
Out[2]: 210.0

In [3]: 5.0 // 2.0
Out[3]: 2.0

In [4]: %doctest_mode
*** Pasting of code with ">>>" or "..." has been enabled.
Exception reporting mode: Plain
Doctest mode is: ON
>>> 5.0 // 2.0
2.0
>>>
Do you really want to exit ([y]/n)? n