A cone has the same area as a cylinder. The volume of the cylinder is twice the volume of the cone, and the height of the cylinder is 2 decimeters. Find the height of the cone.
一个圆锥与一个圆柱底面积相等．圆柱的体积是圆锥体积的2倍，圆柱的高是2分米，求圆锥的高．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 * 3</gadget>
<output>3</output>

<result>3</result>