A cube, if its edge length is reduced to the original (1/3), then how much is its volume reduced to the original
一个正方体，如果它的棱长缩小到原来的(1/3)，那么它的体积缩小到原来的多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * (1/3) * (1/3)</gadget>
<output>1/27 = around 0.037037</output>

<result>1/27 = around 0.037037</result>