A square vegetable field has a side length of 600 meters, what is the area of the vegetable field in hectares?
一块正方形菜地，边长是600米，这块菜地的面积是多少公顷．
<gadget id="calculator">600 * 600</gadget>
<output>360_000</output>

<gadget id="calculator">360_000 / 10_000</gadget>
<output>36</output>

<result>36</result>