כפל במאונך

‎\[
\begin{equation} \begin{array}{r}
\smash{ 267 } \\
\times 431 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{267} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{801} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{1068} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{115077} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 143 } \\
\times 460 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{0} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{858} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{572} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{65780} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 406 } \\
\times 573 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1218} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{2842} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{2030} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{232638} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 912 } \\
\times 371 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{912} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{6384} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{2736} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{338352} \,
\end{array} \end{equation}
\]