The garment factory needs to process 3600 sets of garments, which is planned to be completed in 10 days. In fact, 120 more sets are processed every day. How many days did it actually take to complete the processing task of this batch of garments?
服装厂要加工3600套服装，计划10天完成．实际每天多加工120套，完成这批服装的加工任务实际用了多少天？
<gadget id="calculator">3_600 / 10</gadget>
<output>360</output>

<gadget id="calculator">360 + 120</gadget>
<output>480</output>

<gadget id="calculator">3_600 / 480</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>