pgfmathparse with glossary entries

[apprenticius]

Why do I get the error "Missing \endcsname inserted. \pgfmathparse{10*\gls{test}}"?
How can I fix, so I can use something like "\glsname{test}" instead of \test?

\documentclass[11pt, a4paper, fleqn, twoside]{article}
\def\test{0.005}
\newglossaryentry{test}{type=symbols,name={\test},sort=test,description={test}}

\begin{document}
\pgfmathparse{10*\glsname{test}}\pgfmathresult

\printnoidxglossaries
\end{document}

[muzimuzhi]

An expandable way is needed. \glsname is not expandable, while \glsentryname is.

\documentclass[11pt, a4paper, fleqn, twoside]{article}
\usepackage{glossaries}
\usepackage{tikz}

\def\test{0.005}
% ! Package glossaries Error: Glossary type `symbols' has not been defined.
\newglossaryentry{test}{type=symbols,name={\test},sort=test,description={test}}

\begin{document}
\pgfmathparse{10*\glsentryname{test}}\pgfmathresult % typesets "0.05005"

\printnoidxglossaries
\end{document}

[apprenticius]

Wow! - Thanks a lot!

[muzimuzhi]

\pgfmathparse{10*\glsentryname{test}}\pgfmathresult % typesets "0.05005"

The LaTeX command \fpeval{<floating point expression>} doesn't come with a rounding error

\fpeval{10*\glsentryname{test}} % typesets "0.05"

See texdoc usrguide for more info.