A sprinkler moves forward 34 meters per minute, and its sprinkling width is 7 meters. How many square meters is the area covered by this sprinkler for half an hour?
一辆洒水车每分钟前进34米，它洒水的宽度为7米，这辆洒水车洒水半个小时的面积是多少平方米？
<gadget id="calculator">34 * 7 * 30</gadget>
<output>7_140</output>

<result>7_140</result>