If the base of a parallelogram is 4 decimeters and the height is twice the base, what is the area of the parallelogram in square decimeters?
一个平行四边形的底是4分米，高是底的2倍，平行四边形的面积是多少平方分米．
<gadget id="calculator">4 * 2 * 4</gadget>
<output>32</output>

<result>32</result>