Water increases in volume as it freezes. If there are 20 liters of water, the volume will become 22 liters after freezing, how much will the volume increase?
水结成冰后体积会增加．现有20升的水，结冰后体积变成22升，体积增加了百分之几？
<gadget id="calculator">22 - 20</gadget>
<output>2</output>

<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>