A bag of flour weighs 25 kilograms. After 10% is used, add another 10%. What is the weight of the bag of flour now?
一袋面粉重25千克，用去10%后，再增加10%，这袋面粉现在重多少千克．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

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

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

<gadget id="calculator">25 * (9/10) * (11/10)</gadget>
<output>99/4 = around 24.75</output>

<result>99/4 = around 24.75</result>