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Let’s check out your problem:

\begin{tabular}{|c|c|c|}$\newline$\hline $2$ & $8$ & $\mathrm{x}$ \\$\newline$\hline $11$ & $1$ & $122$ \\$\newline$\hline $4$ & $7$ & $23$ \\$\newline$\hline$\newline$\end{tabular}