A cylindrical pool has an inner bottom diameter of 4 meters and a volume of 28.26 cubic meters. What is the height of the pool?
一个圆柱形水池，内底面直径是4米，它的容积是28.26立方米，水池的高是多少．
<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">28.26 / 12.56</gadget>
<output>2.25</output>

<result>2.25</result>