A cylinder has a volume of 25.12 cubic centimeters and a base diameter of 4 centimeters. What is its height in centimeters?
一个圆柱的体积是25.12立方厘米，底面直径是4厘米，它的高是多少厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">25.12 / 12.56</gadget>
<output>2</output>

<result>2</result>