If the cylindrical wood is cut into the largest cone and the weight is reduced by 12 kg, what is the weight of the original cylinder in kg?
把圆柱形木料削成最大的圆锥，重量减少12千克，原来圆柱的重量是多少千克．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 / (2/3)</gadget>
<output>18</output>

<result>18</result>