| $$ \begin{aligned}4\cdot4\cdot4-3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}64-3 \xlongequal{ } \\[1 em] & \xlongequal{ }61\end{aligned} $$ | |
| ① | $$ 4 \cdot 4 \cdot 4 = 64 $$ |