The original price of a commodity is 500 yuan, the price is first increased by 10%, and then the price is reduced by 10%, what is the current price?
一件商品原价500元，先提价10%，再降价10%，现在价格是多少元．
<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">500 * (11/10)</gadget>
<output>550</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">550 * (9/10)</gadget>
<output>495</output>

<result>495</result>