What would be the symbol for 'multiplication on division'?

Question

The symbol I would like to obtain ought to be like the symbol '\pm'.

Answer 1

The symbol you need to use is produced by the following command:

\divideontimes

Answer 2

Here are some possibilities with the use of unicode (just as a demonstrative addition to Adam's answer). The Unicode for this symbol is U+22C7.

% arara: lualatex

\documentclass{article}
\usepackage{fontspec}
\usepackage{unicode-math}

\begin{document}
    \noindent\setmainfont{code2000.ttf}\symbol{"22C7}\setmainfont{quivira.otf}\symbol{"22C7}\setmainfont{symbola.ttf}\symbol{"22C7}\\
    $\divideontimes$\setmathfont{XITS Math}$\divideontimes$\setmathfont{Asana Math}$\divideontimes$\setmathfont{TeX Gyre Pagella Math}$\divideontimes$
\end{document}

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PS: If you want to use one of the first-row symbols, you will have to wrap it in a \mathrel{} command.