The unit price of a jacket is 280 yuan. First the price was increased by 10%, and then the price was reduced by 10%. Compared with the original price, is the current price increased or decreased? How much is the increase or decrease?
一件上衣单价是280元，先提价10%，又降价10%，现在售价与原价比较，是提了还是降了？提降的幅度是多少？
<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">280 * (11/10) * (9/10)</gadget>
<output>1_386/5 = around 277.2</output>

<gadget id="calculator">280 - (1_386/5)</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">(14/5) / 280</gadget>
<output>1/100 = around 0.01</output>

<result>1/100 = around 0.01</result>