If the original price of an item is 100 yuan, the price is first increased by 10%, and then the price is reduced by 10%, so what is the current price of the original price?
一件物品原价100元，先提价10%，再降价10%出售，那么现价是原价的多少．
<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>

<gadget id="calculator">99 / 100</gadget>
<output>99/100 = around 0.99</output>

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