Buy items with a total of 96,000 yuan. If you sell all of them at 600 yuan each, you can earn 25%. But in fact, part of them are sold at 600 yuan each, and the rest are sold at 500 yuan each. The only one is 15%, how many of them are sold at 600 yuan each.
用总额96000元买进物品，如果全部以每个600元卖出，就可赚二成五，可实际上，其中一部分是每个600元卖出，其余以每个500元卖出，所赚的只是一成五，有多少个是以每个600元卖出的．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">96_000 * (3/20)</gadget>
<output>14_400</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">600 / (5/4)</gadget>
<output>480</output>

<gadget id="calculator">500 - 480</gadget>
<output>20</output>

<gadget id="calculator">96_000 / 480</gadget>
<output>200</output>

<gadget id="calculator">20 * 200</gadget>
<output>4_000</output>

<gadget id="calculator">14_400 - 4_000</gadget>
<output>10_400</output>

<gadget id="calculator">600 - 500</gadget>
<output>100</output>

<gadget id="calculator">10_400 / 100</gadget>
<output>104</output>

<result>104</result>