The roller of the roller is a cylinder. The drum is 1 meter in diameter and 1.5 meters long. Now the roller rolls forward for 40 circles, what is the area of the pressed road?
压路机的滚筒是一个圆柱体．滚筒直径1米，长1.5米．现在滚筒向前滚动40周，被压路面的面积是多少？
<gadget id="calculator">3.14 * 1 * 1.5 * 40</gadget>
<output>188.4</output>

<result>188.4</result>