MathJax code for requested table

gistfile1.txt

\let\fnt=\rm
\bbox[1ex,#BEF]{\textstyle\fnt
\frac{3\times 10^8\ m}{s}
\ \style{background-color:white}{
\begin{array}{|c|c|}
\hline
\Rule{0px}{1.25em}{.8em}
\llap{\times}\fnt\frac{3600\ s}{1\ hr}&
\llap{\times}\fnt\frac{100\ cm}{1\ m}&
\llap{\times}\fnt\frac{1\ in}{2.54\ cm}&
\llap{\times}\fnt\frac{1\ ft}{12\ in}&
\llap{\times}\fnt\frac{1\ mi}{5280\ ft}
\rlap{=}\\
\hline
\end{array}}
\ \ {\scriptstyle 11{,}200{,}00}\frac{mi}{hr}
}