Xinxin Garment Factory needs to produce a batch of school uniforms. The ratio of the number of completed sets in the first week to the total number of this batch of school uniforms is 1:4. If 2,500 more sets are produced, half of this batch of school uniforms will be completed. How many sets of this batch of school uniforms are there in total? ?
欣欣服装厂要生产一批校服，第一周完成的套数与这批校服的总套数的比是1：4，如果再多生产2500套，就完成这批校服的一半，这批校服共多少套？
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">2_500 / 1</gadget>
<output>2_500</output>

<gadget id="calculator">4 * 2_500</gadget>
<output>10_000</output>

<result>10_000</result>