309 × 3
Giải thích
Lời giải\[\begin{array}{l} \times \begin{array}{*{20}{c}}\begin{array}{l}309\\{\rm{ }}3\end{array}\hline\end{array}\\{\rm{ }}927\end{array}\]
Lời giải\[\begin{array}{l} \times \begin{array}{*{20}{c}}\begin{array}{l}309\\{\rm{ }}3\end{array}\hline\end{array}\\{\rm{ }}927\end{array}\]