The area of a parallelogram is 9 square decimeters, the base is enlarged by 4 times, and the height remains the same, what is its area dm**2.
一个平行四边形的面积是9平方分米，底扩大4倍，高不变，它的面积是多少dm**2．
<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<result>36</result>