If the base and height of a parallelogram are tripled simultaneously, how many times is the area of the parallelogram enlarged?
一个平行四边形的底和高同时扩大到原来的3倍，那么这个平行四边形的面积扩大到原来的多少倍．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>