In order to improve the image of the city, a certain city plans to expand the length of a rectangular park to 4 times its original size and its width to 2 times its original size. The area of the park after the expansion is how many times that before the expansion.
某市为提升城市形象，计划将一个长方形公园的长扩大到原来4倍，宽扩大到原来的2倍．扩建后的公园面积是扩建前的多少倍．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>