Huali Garment Factory plans to produce 40,000 shirts a month. If the first half of the month is completed (5/8), and the second half of the month is the same as the first half, how many more shirts will be produced this month than originally planned?
华丽服装厂计划一个月生产衬衫40000件，如果上半月完成(5/8)，下半月完成的与上半月同样多，这个月生产的衬衫比原计划多多少件？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(5/8) * 2</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) - 1</gadget>
<output>1/4 = around 0.25</output>

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

<result>10_000</result>