There is a rectangular bamboo mat with a length of 18.84m and a width of 2m, which is used to enclose a cylinder of grain. What is the maximum volume of this grain storage in cubic meters?
有一张长18.84m，宽2m的长方形竹席，用它围成一个圆柱体粮囤．这个粮囤的容积最大多少立方米？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2</gadget>
<output>56.52</output>

<result>56.52</result>