A cylindrical block of wood has a volume of 180 cubic centimeters, how many cubic centimeters should be cut off to form the largest cone.
一个圆柱体木块，体积是180立方厘米，要把它削去多少立方厘米正好削成一个最大的圆锥体．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">180 * (2/3)</gadget>
<output>120</output>

<result>120</result>