The original price of a piece of clothing is 100 yuan. Due to the peak sales season, the price is increased by 10%. After a period of time, the price has to be reduced by 10% because of the old style. What is the current price?
一件衣服原价100元，因销售旺季，提价10%，一段时间后，因样式陈旧，不得不又降价10%，则现价是多少元
<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">100 * (11/10) * (9/10)</gadget>
<output>99</output>

<result>99</result>