The diameter of the road roller is 2 meters, the width is 3 meters, and it rotates 10 times per minute, how many square meters of road is rolled per minute
压路机滚筒直径2米，宽3米，每分钟转10周，每分钟压路多少平方米㎡
<gadget id="calculator">3.14 * 2 * 10</gadget>
<output>62.8</output>

<gadget id="calculator">62.8 * 3</gadget>
<output>188.4</output>

<result>188.4</result>