A cylinder has a base circumference of 25.12 decimeters and a height of 2 decimeters, what is its volume?
一个圆柱的底面周长是25.12分米，高是2分米，体积是多少？
<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</gadget>
<output>50.24</output>

<gadget id="calculator">50.24 * 2</gadget>
<output>100.48</output>

<result>100.48</result>