2. Please fill in the four boxes below with the numbers $1$, $9$, $8$, and $3$. How should you fill them to get the maximum product? How should you fill them to get the minimum product?
$\square \square \times \square \square=$ ?
\begin{aligned} \text { 2. } & \text { Maximum: } 91 \times 83=7553 \text {, } \\ \text { Minimum: } & 18 \times 39=702 .\end{aligned}