There is a kind of clothes in the shop, the original price of each piece is 100 yuan, the price is first increased by 10%, and then the price is reduced by 10%. How much is this kind of clothes now?
商店有一种衣服，每件原价100元，先升价10%，再降价10%．这种衣服现在每件多少钱？
<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>