A cone has the same base area as a cylinder, and the height of the cone is half the height of the cylinder. If the volume of the cone is 30 cubic decimeters, what is the volume of the cylinder?
一个圆锥和一个圆柱底面积相等，圆锥的高是圆柱的高的一半．如果圆锥的体积是30立方分米，那么圆柱的体积是多少立方分米．
<gadget id="calculator">30 * 3 * 2</gadget>
<output>180</output>

<result>180</result>