triangular vegetable field has a base length of 500 meters and a height of 60 meters. What is the area of this vegetable field in square meters?
一块三角形菜地，底边长500米，高60米．这块菜地的面积是多少平方米？
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">500 * 30</gadget>
<output>15_000</output>

<result>15_000</result>