A roller has a length of 2.5 meters and a diameter of 2 meters. If rolling 10 weeks, how many square meters is the area of the road?
一台压路机的滚筒长2.5米，直径是2米．如果滚动10周，压路的面积是多少平方米？
<gadget id="calculator">3.14 * 2 * 10 * 2.5</gadget>
<output>157</output>

<result>157</result>