A rectangular piece of paper with a length of 12.56 cm and a width of 8 cm is rolled into a cylinder with it as a side. What is the maximum volume of this cylinder?
一个长方形纸片，长12.56厘米，宽8厘米，以它作为侧面卷成一个圆柱体，这个圆柱体最大体积是多少？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 8</gadget>
<output>100.48</output>

<result>100.48</result>