A cylinder and a cone have the same base area and the volume ratio is 2:1. If the height of the cone is 6 decimeters, what is the height of the cylinder?
一个圆柱和一个圆锥的底面积相等，体积之比是2：1．如果圆锥的高是6分米，那么圆柱的高是多少分米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 * (2/3)</gadget>
<output>4</output>

<result>4</result>