triangle and a parallelogram have the same base and height. If the area of the triangle is 36 square decimeters, what is the area of the parallelogram?
一个三角形和平行四边形等底等高，如果这个三角形的面积是36平方分米，那么这个平行四边形的面积是多少平方分米．
<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>