Cut a cylindrical wooden block with a volume of 90cm**3 into the largest cone, what is the volume of this cone in cm**3.
把一个体积是90cm**3的圆柱体木块削成一个最大的圆锥，这个圆锥的体积是多少cm**3．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">90 * (1/3)</gadget>
<output>30</output>

<result>30</result>