The circumference of the base of a cylinder is 125.6 decimeters and the height is 9 decimeters. What is its volume?
一个圆柱的底面周长是125.6分米，高是9分米，它的体积是多少．
<gadget id="calculator">125.6 / 3.14 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 ** 2</gadget>
<output>400</output>

<gadget id="calculator">3.14 * 400 * 9</gadget>
<output>11_304</output>

<result>11_304</result>