Dig a cylindrical pool with a volume of 9.42 cubic meters and a diameter of 2 meters at the mouth of the pool. How many meters should be dug deep?
挖一个容积是9.42立方米的圆柱形水池，池口直径2米，应挖几米深？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">9.42 / 3.14</gadget>
<output>3</output>

<result>3</result>