clothing store sells two kinds of T-shirts. One is fashionable, priced at 84 yuan each, and can earn 20%; After selling one of these two T-shirts, did they make money or lose money? How much money can you earn (lose)?
一家服装店出售两种T桖，一种款式新颖，每件售价84元，可赚20%；另一种款式陈旧，是处理品，赔本20%，每件售价也是84元．这两种T恤各卖一件后是赚了还是赔本？能赚(赔)多少钱？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">84 / (6/5)</gadget>
<output>70</output>

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

<gadget id="calculator">84 / (4/5)</gadget>
<output>105</output>

<gadget id="calculator">70 + 105</gadget>
<output>175</output>

<gadget id="calculator">84 * 2</gadget>
<output>168</output>

<gadget id="calculator">175 - 168</gadget>
<output>7</output>

<result>7</result>