A garment factory produced 4,500 sets of sportswear in February, which was 10% less than that in January. How many sets of sportswear were produced less in February than in January?
某服装厂2月份生产运动服4500套，比1月份少10%，二月份比一月份少生产运动服多少套？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">4_500 / (9/10)</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 - 4_500</gadget>
<output>500</output>

<result>500</result>