There are two batches of goods in the mall, both selling for 1200 yuan. One batch earned 20%, while the other group lost 20%. When the manager finally calculated the profits of these two batches of goods, he found that the loss was how many yuan
商场里有两批商品，都卖1200元．其中一批赚了20%，另一批却亏了20%．经理最后计算这两批商品的利润时，发现是亏了多少元
<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">1_200 / (4/5)</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 - 1_200</gadget>
<output>300</output>

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

<gadget id="calculator">1_200 / (6/5)</gadget>
<output>1_000</output>

<gadget id="calculator">1_200 - 1_000</gadget>
<output>200</output>

<gadget id="calculator">300 - 200</gadget>
<output>100</output>

<result>100</result>