The original price of a pair of jeans is 100 yuan, first increase the price by 10%, and then reduce the price by 10%, what is the current price?
一件原价为100元的牛仔裤，先提价10%，再降价10%，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>