$$ \begin{aligned}2\cdot2^3\cdot2^2& \xlongequal{ }2\cdot8\cdot4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}64\end{aligned} $$ | |
① | $$ 2 \cdot 8 \cdot 4 = 64 $$ |