A cylindrical reservoir is to be dug in a paddy field with a diameter of 12 meters. How deep should it be dug to make its volume 282.6 cubic meters?
水田里要挖一个圆柱形蓄水池，直径是12米，要使它的容积是282.6立方米，应挖多深？
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<gadget id="calculator">282.6 / 113.04</gadget>
<output>2.5</output>

<result>2.5</result>