Haima Automobile Factory produced 50,000 cars in the first half of the year, and produced 18,000 more cars in the second half of the year than in the first half.
海马汽车厂上半年生产汽车5万辆，下半年比上半年多产1.8万辆，该厂下半年汽车产量比上半年增长百分之几？
<gadget id="calculator">1.8 / 5</gadget>
<output>0.36</output>

<result>0.36</result>