To make a cylindrical iron drum with a capacity of 62.8 liters, if the radius of the bottom is 2 decimeters, how many decimeters should be the height?
要制作容量是62.8升的圆柱形铁桶，如果底面半径是2分米，高应是多少分米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">62.8 / 12.56</gadget>
<output>5</output>

<result>5</result>