The volume and base area of a cylinder are equal to those of a cone. The height of the cylinder is 20.8 cm, and the height of the cone is decimeters.
一个圆柱的体积、底面积与一个圆锥的体积、底面积相等，已知圆柱的高是20.8cm，圆锥的高是多少分米．
<gadget id="calculator">20.8 * 3</gadget>
<output>62.4</output>

<gadget id="calculator">62.4 / 10</gadget>
<output>6.24</output>

<result>6.24</result>