A road roller has a diameter of 1.2 meters and a length of 3 meters. It rotates 10 times per minute. How many square meters is rolled per minute?
一种压路机滚筒，直径是1.2米，长3米，每分钟转10周，每分钟压路多少平方米？
<gadget id="calculator">3.14 * 1.2 * 10</gadget>
<output>37.68</output>

<gadget id="calculator">37.68 * 3</gadget>
<output>113.04</output>

<result>113.04</result>