The length of the cuboid is increased by 20%. If the width is reduced by 20%, how much should the height be to keep the volume constant?
长方体长增加20%．宽减少20%，要使体积不变，高应多少．
<gadget id="calculator">25 / 24</gadget>
<output>25/24 = around 1.041667</output>

<gadget id="calculator">(25/24) - 1</gadget>
<output>1/24 = around 0.041667</output>

<result>1/24 = around 0.041667</result>