For a parallelogram, the base is enlarged by 3 times, the height is enlarged by 4 times, and the area is enlarged by how many times the original
一个平行四边形，底扩大到原来的3倍，高扩大到原来的4倍，面积扩大到原来的多少倍
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>