Đặt tính rồi tính: 15 294 × 3

\[\begin{array}{l} \times \begin{array}{*{20}{c}}{15\,\,294}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,3} }\end{array}\\\,\,\,45\,\,882\end{array}\]

\[\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,20\,\,613}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,7} }\end{array}\\\,\,\,144\,\,291\end{array}\]

\[\begin{array}{l} \times \begin{array}{*{20}{c}}{372\,\,509}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2} }\end{array}\\\,\,\,\,745\,\,018\end{array}\]