If the perimeter of a cube is 2dm, what is its volume in cubic decimeters?
一个正方体一个面的周长是2dm，它的体积是多少立方分米．
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2) * (1/2)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>