What is the volume of a cylinder with a base circumference of 25.12 cm and a height of 10 cm?
一个底面周长为25.12cm，高为10cm的圆柱体，它的体积是多少立方厘米．
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 10</gadget>
<output>502.4</output>

<result>502.4</result>