Master Li has to process 4,500 parts, and processed 75 parts in 5 days. According to this calculation, how many days will it take Master Li to process these parts?
李师傅要加工4500个零件，5天加工了75个．照这样计算，李师傅要用多少天才能将这批零件加工完成？
<gadget id="calculator">75 / 5</gadget>
<output>15</output>

<gadget id="calculator">4_500 / 15</gadget>
<output>300</output>

<result>300</result>