When water freezes, its volume increases by 2/23, and when ice turns into water, its volume decreases.
水结成冰，体积增加原来的(2/23)，冰化成水后，体积减少多少．
<gadget id="calculator">2 / 23</gadget>
<output>2/23 = around 0.086957</output>

<gadget id="calculator">1 + (2/23)</gadget>
<output>25/23 = around 1.086957</output>

<gadget id="calculator">(2/23) / (25/23)</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>