A parallelogram vegetable field has a base of 8 meters and a height of 5 meters. What is the area of the field in square meters?
一块平行四边形菜地，底是8米，高是5米，这块地的面积是多少平方米．
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<result>40</result>