5. (8 points) Multiply 4.02 by a two-digit integer, and the product is an integer. Then, 10 times this product is $\qquad$ .


【Answer】Solution: 4.02 multiplied by a two-digit integer, the product is an integer, this two-digit number is 50, $4.02 \times 50 \times 10=2010$.

Answer: The 10 times of this product is 2010.
Therefore, the answer is: 2010.