כפל במאונך

‎\[
\begin{equation} \begin{array}{r}
\smash{ 580 } \\
\times 973 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1740} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{4060} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{5220} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{564340} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 191 } \\
\times 167 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1337} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{1146} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{191} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{31897} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 636 } \\
\times 683 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1908} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{5088} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{3816} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{434388} \,
\end{array} \end{equation}
\]

‎\[
\begin{equation} \begin{array}{r}
\smash{ 618 } \\
\times 872 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1236} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{4326} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{4944} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{538896} \,
\end{array} \end{equation}
\]