A piece of cylindrical material with a volume of 51 cubic decimeters is cut into the largest cone. What is the volume of the cone?
一段体积是51立方分米的圆柱材料，削成一个最大的圆锥，圆锥的体积是多少立方分米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">51 * (1/3)</gadget>
<output>17</output>

<result>17</result>