The drum of the road roller is a cylinder, its cross-sectional circumference is 3.14 meters, and its width is 2 meters. How much road surface can it press every time it rolls?
压路机的滚筒是一个圆柱形，它的横截面周长是3.14米，宽是2米，每滚一周能压多大的路面？
<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>