$$ \begin{aligned}4(3a^2)^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4\cdot27a^6 \xlongequal{ } \\[1 em] & \xlongequal{ }108a^6\end{aligned} $$ | |
① | $$ \left( 3a^2 \right)^3 = 3^3 \left( a^2 \right)^3 = 27a^6 $$ |