The front wheel of a road roller is 2 meters wide, and the cross-sectional diameter is 1.2 meters. If it turns 10 times per minute, how many square meters is the area that the road roller can press for half an hour?
一台压路机的前轮宽2米，横截面直径为1.2米，如果每分钟转10圈，那么压路机工作半小时压路的面积是多少平方米？
<gadget id="calculator">3.14 * 1.2</gadget>
<output>3.768</output>

<gadget id="calculator">3.768 * 2 * 10 * 30</gadget>
<output>2_260.8</output>

<result>2_260.8</result>