To cut a cylinder with a volume of 72 cubic decimeters into the largest cone, how many cubic decimeters should be cut.
把一个体积是72立方分米的圆柱削成一个最大的圆锥，要削去多少立方分米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">72 * (2/3)</gadget>
<output>48</output>

<result>48</result>