| $$ \begin{aligned}6^3\cdot6^5& \xlongequal{ }216\cdot7776 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}1679616\end{aligned} $$ | |
| ① | $ 216 \cdot 7776 = 1679616 $ |