The garment factory has to process 2,080 sets of school uniforms, and 640 sets were processed in the first 4 days. According to this calculation, how many days will it take to complete the rest of the tasks?
服装厂要加工2080套校服，前4天加工了640套，照这样计算，完成其余部分任务还需要多少天？
<gadget id="calculator">2_080 - 640</gadget>
<output>1_440</output>

<gadget id="calculator">640 / 4</gadget>
<output>160</output>

<gadget id="calculator">1_440 / 160</gadget>
<output>9</output>

<result>9</result>