9. (3 points) The product of two numbers, A and B, is 1.6. If A is multiplied by 5 and B is also multiplied by 5, then the product of A and B is $\qquad$ .
【Solution】Solution: $1.6 \times(5 \times 5)$
$$
\begin{array}{l}
=1.6 \times 25 \\
=40
\end{array}
$$

Answer: The product of the two numbers, A and B, is 40. Therefore, the answer is: 40.