What is the volume of a conical wheat pile whose base circumference is 25.12 decimeters and height is 15 decimeters?
一个底面周长是25.12分米，高是15分米的圆锥形麦堆，它的体积是多少？
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 16 * (1/3) * 15</gadget>
<output>251.2</output>

<result>251.2</result>