Monkey King's Ruyi Golden Cudgel is 25 meters high and 3.14 meters in circumference. What is its volume in cubic meters.
孙悟空的如意金箍棒高25米，周长3.14米．它的体积是多少立方米．
<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 25</gadget>
<output>19.625</output>

<result>19.625</result>