| $$ \begin{aligned}\sqrt{8}\cdot\sqrt{32}& \xlongequal{ }\sqrt{256} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}16\end{aligned} $$ | |
| ① | The square root of $ 256 $ is $ 16 $. |