A road roller travels 30 meters per minute, the width of the road is 3 meters, and the road roller travels for 5 minutes, how much ground can it press?
一辆压路机，每分钟行驶30米，压路宽度是3米，压路机行驶5分钟，能压多大的地面？
<gadget id="calculator">30 * 3 * 5</gadget>
<output>450</output>

<result>450</result>