Hongxin Garment Factory plans to produce 40,000 shirts this month, which will be completed in the first half of the month (3/8). If the second half of the month is completed as much as the first half, how many fewer shirts will be produced this month than the original plan?
红新服装厂计划本月生产衬衫40000件，上半月完成(3/8)，如果下半月完成的与上半月同样多，本月生产的衬衫将比原计划少多少件？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) * 2</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40_000 * (1/4)</gadget>
<output>10_000</output>

<result>10_000</result>