12kg increased by 10%, and then reduced by 10%. How many kilograms is the result less than the original?
12kg增加10%后，再减少10%．结果比原来少多少千克？
<gadget id="calculator">10 / 100</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">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">12 * (11/10) * (9/10)</gadget>
<output>297/25 = around 11.88</output>

<gadget id="calculator">12 - (297/25)</gadget>
<output>3/25 = around 0.12</output>

<result>3/25 = around 0.12</result>