A rectangular paddy field covering an area of 4 hectares is 800 meters long, what is its width in meters?
一块占地4公顷的长方形稻田，长800米，它的宽是多少米？
<gadget id="calculator">4 * 10_000</gadget>
<output>40_000</output>

<gadget id="calculator">40_000 / 800</gadget>
<output>50</output>

<result>50</result>