The height of a parallelogram is 8 decimeters, and the height is twice the base. What is the area of the parallelogram?
一个平行四边形的高是8分米，高是底的2倍，平行四边形的面积是多少．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<result>32</result>