A harvester with a harvesting width of 3 meters travels 50 meters per minute. How many square meters of rice can be harvested by this harvester for 1 hour?
一台收割机，收割的宽度是3米，每分钟行驶50米．这台收割机工作1小时，可收割稻谷多少平方米？
<gadget id="calculator">3 * 50 * 60</gadget>
<output>9_000</output>

<result>9_000</result>