The volume of ice turned into water is reduced by 10%. Put 2 liters of water in the refrigerator, what is the volume when it freezes
冰化成水体积要减少10%．把2升水放进冰箱，结成冰后的体积是多少
<gadget id="calculator">10 / 100</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">2 / (9/10)</gadget>
<output>20/9 = around 2.222222</output>

<result>20/9 = around 2.222222</result>