Aunt Zhang sold two sets of skirts at a price of 480 yuan each, one set was 20% higher than the purchase price, and the other was 20% lower than the purchase price. Is Aunt Zhang gaining or losing?
张阿姨以每套480元的价格卖了两套裙子，其中一套比进价提高20%，另一套比进价降低20%．张阿姨是赚还是亏？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">480 / (4/5)</gadget>
<output>600</output>

<gadget id="calculator">600 * (1/5)</gadget>
<output>120</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">480 / (6/5)</gadget>
<output>400</output>

<gadget id="calculator">400 * (1/5)</gadget>
<output>80</output>

<gadget id="calculator">120 - 80</gadget>
<output>40</output>

<result>40</result>