cylindrical cistern has a bottom diameter of 8 meters and a height of 4 meters. There is 150.72 cubic meters of water in the cistern. What is the height of the water in the cistern?
一个圆柱形蓄水池，底面直径8米，高4米，蓄水池中现有水150.72立方米，水池中水的高度是多少米？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">150.72 / 50.24</gadget>
<output>3</output>

<result>3</result>