Uncle Li wants to dig a cylindrical fish pond with a diameter of 20 meters and an estimated volume of 314 cubic meters. How deep should the fish pond be?
李叔叔要挖一个直径是20米的圆柱形鱼池，预计容积是314立方米，这个鱼池至少要挖多深？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">314 / 314</gadget>
<output>1</output>

<result>1</result>