Zhonghua Garment Factory plans to produce 75 packs of garments per day, a total of 600 sets, but actually produces 50 sets per day. How many days did this delay the completion of the task?
中华服装厂计划每天生产75装服装，一共要生产600套，实际上每天生产50套．这样推迟了几天完成任务？
<gadget id="calculator">600 / 50</gadget>
<output>12</output>

<gadget id="calculator">600 / 75</gadget>
<output>8</output>

<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<result>4</result>