A kind of refrigerator, after the price of each refrigerator is increased by 10%, the price is reduced by 10%, what percentage of the original price is the price of each refrigerator now?
一种电冰箱，每台提价10%后，又降价10%，现在每台电冰箱的价钱是原价的百分之几？
<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">(11/10) * (9/10)</gadget>
<output>99/100 = around 0.99</output>

<result>99/100 = around 0.99</result>