I'm facing a strange behavior of `HoldForm`.

I need to display `1/2*3/4` in LaTeX like this :
$$ \frac{1}{2} \times \frac{3}{4} $$

So I use Mathematica : `1/2* 3/4 // HoldForm // TeXForm`
BUT I get 
$$ \frac{3}{2\ 4} $$

First the writing `2 space 4` is ambigous and second it does not hold form at all :(

Can you help me ?
Thank you ! (happy Holidays)

**EDIT : I would need (a simple) automatic transformation of any input to correct TeX.**