Well then, that's not an equation either!
The equal sign in mathematics really does mean absolute equality. If it is only an approximate equality, you need to use the squiggly equal sign to denote that.
Well yes, I know, but anyway, I know it that way.
In fact, have you ever seen a
completely even matchstick? I really doubt that. So, the equal sign, laid down using matchsticks, will never be one.
(OK, that is just a cheap excuse; when I draw an equal sign using a pencil it isn't completely even either.
)
Anyway, the answer is...
_
|| = XX|| / X||
(This is meant to be a Pi; and note, the matchsticks forming the '=' aren't completely even.
)