The garment factory plans to produce 2,400 sets of garments. After part of the production, there is still (1/4) unfinished, how many sets have been produced?
服装厂计划生产服装2400套．生产一部分后，还剩(1/4)没完成，已经生产了多少套？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2_400 * (3/4)</gadget>
<output>1_800</output>

<result>1_800</result>