\[ \frac{4^{10^{10}} \cdot 9^{10^{10}}}{3^{2019} \cdot 16^{504}} \]

----- Nội dung ảnh -----
```
Câu 3.
\[
\frac{4^{10^{10}} \cdot 9^{10^{10}}}{3^{2019} \cdot 16^{504}}
\]
```