The garment factory used 2,500 meters of fabric in October. In November, the amount of fabric used decreased (1/5) due to the improvement of technology. How much fabric was used in November?
服装厂十月份用布料2500米，十一月份因改进工艺，用布量下降了(1/5)，十一月份用了多少布料？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2_500 * (4/5)</gadget>
<output>2_000</output>

<result>2_000</result>