A workshop assembles a batch of TV sets. If 50 sets are installed every day, the task can be completed in 60 days. If it takes 40 days to complete the task, how many sets should be installed each day? (Solution by proportional method)
一个车间装配一批电视机，如果每天装50台，60天完成任务，如果要用40天完成任务，每天应装多少台？(用比例方法解)
<gadget id="calculator">50 * 60</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 / 40</gadget>
<output>75</output>

<result>75</result>