A rectangular paddy field is 30 meters long and 20 meters wide, and 6 kilograms of rice can be harvested per square meter. How many kilograms of rice can be harvested in this paddy field?
一块长方形水田，长30米，宽20米，每平方米收稻子6千克，这块水田一共可收多少千克的稻子？
<gadget id="calculator">30 * 20 * 6</gadget>
<output>3_600</output>

<result>3_600</result>