A factory plans to produce a batch of electric fans. If it produces 50 units per day, it will be completed on schedule. If it produces 60 units per day, it will be completed 5 days in advance. Question: How many electric fans are planned to be produced?
一个工厂计划生产一批电风扇，若每天生产50台，则按期完成，若每天生产60台，则提前5天完成，问：计划生产电风扇多少台？
<gadget id="calculator">60 * 5</gadget>
<output>300</output>

<gadget id="calculator">60 - 50</gadget>
<output>10</output>

<gadget id="calculator">300 / 10</gadget>
<output>30</output>

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

<result>1_500</result>