The school builds a circular fountain with a volume of 37.68 cubic meters and an inner diameter of 4 meters. How deep is the pool?
学校修建一个圆形喷水池容积是37.68立方米，池内直径是4米，那么这个水池深多少米．
<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">37.68 / 12.56</gadget>
<output>3</output>

<result>3</result>