cylinder and a cone have the same volume and base area, and the height of the cone is 30 cm, what is the height of the cylinder?
一个圆柱体和一个圆锥的体积和底面积都相等，圆锥体的高是30cm，那么圆柱体的高是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 * (1/3)</gadget>
<output>10</output>

<result>10</result>