A rectangular wheat field is 500 meters long and 300 meters wide. How many hectares is the area of this wheat field?
一块长方形小麦田，长500米，宽300米．这块麦田的面积是多少公顷？
<gadget id="calculator">500 * 300</gadget>
<output>150_000</output>

<gadget id="calculator">150_000 / 10_000</gadget>
<output>15</output>

<result>15</result>