Master Li processes a batch of parts. If he processes 50 parts per day, it will be 8 days later than planned, and if he processes 60 parts per day, it will be 5 days earlier than planned. How many parts are there in total?
李师傅加工一批零件，若每天加工50个，要比计划晚8天，每天加工60个，则比计划提前5天，这批零件共多少个？
<gadget id="calculator">300 / 10</gadget>
<output>30</output>

<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<result>1_500</result>