| $$ \begin{aligned}a^3a^2\cdot10a\cdot10& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}100a^6\end{aligned} $$ | |
| ① | $$ a^3 a^2 \cdot 10 a \cdot 10 = 100 a^{3 + 2 + 1} = 100 a^6 $$ |