Writing two right hand sides in an equation in latex

I want to write LATeX code whose output should look like this:

A = B + C
= 2 + 3


I'm trying to write the following code in LATeX:


A &= B + C \\
&= 2 + 3


But the output of this code is:

A = B + C = 2 + 3


How to change the latex code to achieve the required output?

Remarks

For detailed information on the mathmode and other neat tricks with mathematics in LaTeX, consult the amsmath guide and Herbert Voß' excellent mathmode manual.

Implementation

\documentclass{article}
\pagestyle{empty}% remove page number for cropping
\usepackage{amsmath}
\begin{document}
\begin{align*}
A &= B + C \\
&= 2 + 3
\end{align*}
\end{document}


Output

• Possibly equation with split if a number is wanted – egreg Oct 29 '13 at 23:50
• @egreg Of course you are right, but there are tons of ways to write a multiline equation, so that I just pointed out one way and linked the documentation. If I was missing any important things, feel free to add them. – Henri Menke Oct 30 '13 at 0:17