כפל במאונך

‎\[
\begin{equation} \begin{array}{r}
\smash{ 291 } \\
\times 438 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{2328} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{873} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{1164} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{127458} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 630 } \\
\times 867 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{4410} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{3780} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{5040} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{546210} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 793 } \\
\times 495 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{3965} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{7137} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{3172} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{392535} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 604 } \\
\times 137 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{4228} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{1812} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{604} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{82748} \,
\end{array} \end{equation}
\]