Probably 2.
If you multiply me by myself...
Let's replace that statement with [tex]x[/tex]
The product is equal if you double me once.
That would now be an equation, which is:
[tex]x^2 = 2x[/tex]
If [tex]x = 2[/tex], then:
[tex]2^2 = 2 (2) \\ 4 = 4[/tex]
