If you sell a pair of shoes for 112 yuan, you can earn 40%. If you sell it for 16 yuan less, how much can you still earn?
一双鞋子如果卖112元，可赚40%，如果再少卖16元，仍可赚多少
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">112 / (7/5)</gadget>
<output>80</output>

<gadget id="calculator">112 - 16 - 80</gadget>
<output>16</output>

<gadget id="calculator">16 / 80</gadget>
<output>1/5 = around 0.2</output>

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