The price of a piece of clothing is increased by 10% due to the peak sales season. After a period of time, the price has to be reduced by 10% because of the old style. The current price is 99 yuan. What is the original price?
一件衣服，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%，现价是99元，原价是多少元
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * (1/10)</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/10) - (1/10) - (1/100)</gadget>
<output>-1/100 = around -0.01</output>

<gadget id="calculator">1 + (-1/100)</gadget>
<output>99/100 = around 0.99</output>

<gadget id="calculator">99 / (99/100)</gadget>
<output>100</output>

<result>100</result>