A cylindrical bucket has a bottom diameter of 4 decimeters. When filled with water, the volume of water is 62.8 liters. What is the height of the bucket?
一个圆柱形的水桶，底面直径是4分米，装满水后，水的体积是62.8升，这个水桶的高是多少分米？
<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">62.8 / 12.56</gadget>
<output>5</output>

<result>5</result>