A parallelogram green space has a base of 40 meters and a height of 50 meters. On average, each tree occupies an area of 5 square meters. How many trees can be planted in this green space?
一块平行四边形的绿地，底是40米，高是50米，平均每棵树占地5平方米，这块绿地可以种多少棵树？
<gadget id="calculator">40 * 50</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 / 5</gadget>
<output>400</output>

<result>400</result>