Sheng Mart store sells two sets of different clothes at a price of 180 yuan. The boss did the math, and it turned out that one set earned 20% and the other set lost 20%. You help him do the math, is this market a profit or a loss? How much did you earn or lose?
盛玛特商场以180元的价格卖出两套不同的服装．老板一算，结果一套赚20%，一套亏本20%．你帮他算一算，这个商场是赚还是亏？赚或亏多少元？
<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">180 / (4/5)</gadget>
<output>225</output>

<gadget id="calculator">225 - 180</gadget>
<output>45</output>

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

<gadget id="calculator">180 / (6/5)</gadget>
<output>150</output>

<gadget id="calculator">180 - 150</gadget>
<output>30</output>

<gadget id="calculator">45 - 30</gadget>
<output>15</output>

<result>15</result>