When water turns into ice, its volume increases by about 1/10; then when ice turns into water, its volume decreases by about how much
水结成冰，体积约增加(1/10)；那么冰化成水，体积约减少多少
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(11/10) - 1</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) / (11/10)</gadget>
<output>1/11 = around 0.090909</output>

<result>1/11 = around 0.090909</result>