$$ \begin{aligned}\sqrt{6}\cdot\sqrt{24}& \xlongequal{ }\sqrt{144} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}12\end{aligned} $$ | |
① | The square root of $ 144 $ is $ 12 $. |