There is a triangular vegetable field with a base length of 500 meters and a height of 320 meters. What is the area of this triangular vegetable field?
有一块三角形菜地，底边长500米，高320米，这块三角形菜地的面积是多少公顷？
<gadget id="calculator">320 / 2</gadget>
<output>160</output>

<gadget id="calculator">500 * 160</gadget>
<output>80_000</output>

<gadget id="calculator">80_000 / 10_000</gadget>
<output>8</output>

<result>8</result>