When ice turns into water and its volume decreases by 10%, how much does the volume of water increase when it turns into ice?
冰变水后体积减少了10%，水结成冰后，体积增加多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) / (9/10)</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>