| $$ \begin{aligned}12 \cdot \frac{\sqrt{6}}{2}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{12\sqrt{6}}{2} \xlongequal{ } \\[1 em] & \xlongequal{ }6\sqrt{6}\end{aligned} $$ | |
| ① | $$ \color{blue}{ 12 } \cdot \sqrt{6} = 12 \sqrt{6} $$$$ \color{blue}{ 1 } \cdot 2 = 2 $$ |