A road cleaning vehicle cleans the ground with a width of 3 meters and travels 80 meters per minute. How many square meters can the cleaning vehicle clean the ground for 1 hour?
一辆道路清洁车，清洁地面的宽度是3米，每分钟行驶80米．清洁车行驶1小时，能清洁地面多少平方米？
<gadget id="calculator">60 * 80</gadget>
<output>4_800</output>

<gadget id="calculator">4_800 * 3</gadget>
<output>14_400</output>

<result>14_400</result>