A cylindrical iron block with a base area of 6 square centimeters and a height of 3 centimeters is recast into a cone with the same base as it. What is the height of the cone?
一个底面积6平方厘米，高3厘米的圆柱形铁块，重铸成与它等底的圆锥型，这个圆锥高是多少．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>