A cylinder has a base circumference of 15.7 centimeters and a volume of 392.5 cubic decimeters. What is the height of the cylinder in centimeters?
一个圆柱的底面周长是15.7厘米，体积是392.5立方分米．圆柱的高是多少厘米？
<gadget id="calculator">15.7 / 3.14 / 2</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 ** 2</gadget>
<output>6.25</output>

<gadget id="calculator">3.14 * 6.25</gadget>
<output>19.625</output>

<gadget id="calculator">1_000 / 19.625</gadget>
<output>50.955414</output>

<gadget id="calculator">392.5 * 50.955414</gadget>
<output>19_999.999995</output>

<result>19_999.999995</result>