How do I include a figure or table into the exercise environment of the Legrand Orange Book template

Question

I'm currently having an issue with the \exercise environment of the Legrand Orange Book template. After inserting a table into the exercise environment, I get an error which says !LaTeX Error: Float(s) lost.

How do I format the environment to allow for tables and figures to be inserted into it without the error? Below is what causes the error.

\documentclass[11pt,fleqn]{book} % Default font size and left-justified equations
\begin{document}
\section*{Exercises} 

\begin{exercise}
The following measurements have been recorded by a student in their notebook. However, this particular student has not kept a consistent notation scheme and has made a few errors. Comment where you find an error and correct errors where possible:
       \begin{table}[h!]
        \centering
        \begin{tabular}{lll}
            10 $\rightarrow$ 23 & 33 $\rightarrow$ 000 & 015$\rightarrow$ 14 \\
            240/77 W            & 21/60 W              & 000/11 E           
        \end{tabular}
    \end{table}
\end{exercise}
\end{document}

Below are the specifications for the exercise environment:

\newenvironment{exercise}{\begin{eBox}\begin{exerciseT}}
{\hfill{\color{ocre}\tiny\ensuremath{\blacksquare}}\end{exerciseT}\end{eBox}}

And the box for this environment is drawn with:

% Exercise box    
\newmdenv[skipabove=7pt,
skipbelow=7pt,
rightline=false,
leftline=true,
topline=false,
bottomline=false,
backgroundcolor=ocre!10,
linecolor=ocre,
innerleftmargin=5pt,
innerrightmargin=5pt,
innertopmargin=5pt,
innerbottommargin=5pt,
leftmargin=0cm,
rightmargin=0cm,
linewidth=4pt]{eBox}

Answer 1

You don't want that to float so don't put it in a figure, just replace \begin{table}[h!] \centering ..\end{table} by \begin{center}..\end{center}