If the base of a parallelogram is 2 meters and the height is 8 decimeters, what is its area?
一个平行四边形的底是2米，高是8分米，它的面积是多少平方分米．
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 * 8</gadget>
<output>160</output>

<result>160</result>