The breeding factory raises a total of 300 cattle and sheep. The number of cattle is 12.5% less than that of sheep. How many fewer cattle than sheep?
养殖厂共养牛羊300辆，牛的只数比羊少12.5%，牛比羊少多少只？
<gadget id="calculator">12.5 / 100</gadget>
<output>0.125</output>

<gadget id="calculator">1 - 0.125</gadget>
<output>0.875</output>

<gadget id="calculator">0.875 + 1</gadget>
<output>1.875</output>

<gadget id="calculator">300 / 1.875</gadget>
<output>160</output>

<gadget id="calculator">160 * 0.125</gadget>
<output>20</output>

<result>20</result>