road roller is a cylinder with a bottom diameter of 2 meters and a length of 2 meters. If it rotates 5 times, how many square meters will be rolled.
一种压路机滚筒是一个圆柱体，它的底面直径是2米，长2米，如果旋转5圈，一共压路多少平方米．
<gadget id="calculator">3.14 * 2 * 5 * 2</gadget>
<output>62.8</output>

<result>62.8</result>