$$ \begin{aligned}3^5{3^2}^3& \xlongequal{ }243\cdot9^3 \xlongequal{ } \\[1 em] & \xlongequal{ }243\cdot729 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}177147\end{aligned} $$ | |
① | $ 243 \cdot 729 = 177147 $ |