A TV factory accepts a batch of orders, plans to install 400 sets per day, and can complete the task in 25 days. But it is required to deliver 5 days in advance, how many units should be installed every day?
一个电视机厂接受一批订货，计划每天安装400台，25天可完成任务．但要求提前5天交货，每天要安装多少台？
<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<gadget id="calculator">25 / 20</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">400 * (5/4)</gadget>
<output>500</output>

<result>500</result>