If you sell a shirt for 200 yuan, you can earn 60%; if you sell it for 150 yuan, how much can you earn?
一件衬衣如果卖200元，那么可赚60%；如果卖150元，那么可赚多少．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">200 / (8/5)</gadget>
<output>125</output>

<gadget id="calculator">150 - 125</gadget>
<output>25</output>

<gadget id="calculator">25 / 125</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>