A cone is filled with 10mL of water, the height of the water is equal to (1/2) of the cone, find the volume of the cone.
一个圆锥里装了10mL水，水高等于圆锥的(1/2)，求圆锥的体积．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) ** 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">10 / (1/4)</gadget>
<output>40</output>

<result>40</result>