A parallelogram vegetable field has a base of 20 meters and a height of 5 meters. What is the area of the vegetable field in square meters?
一块平行四边形菜地的底20米，高5米，这块菜地的面积是多少平方米．
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<result>100</result>