The circumference of the base of a cylinder is 12.56 decimeters and the height is 5 decimeters. Find the volume of the cylinder.
一个圆柱的底面周长是12.56分米，高是5分米，求这个圆柱的体积．
<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 * 5</gadget>
<output>62.8</output>

<result>62.8</result>