A road roller has a cross-sectional diameter of 0.6 meters and a length of 2 meters. It rotates 10 times per minute. How many square meters is rolled per minute?
一种压路机滚筒，横截面的直径是0.6米，长2米，每分钟转10周，每分钟压路多少平方米？
<gadget id="calculator">3.14 * 0.6 * 2 * 10</gadget>
<output>37.68</output>

<result>37.68</result>