The telecommunications bureau plans to install 360 telephones for users every day in 15 days. In order to allow users to use the phone as soon as possible, the telecommunications bureau completed the task in only 12 days. How many doors are installed per day on average.
电信局计划用15天时间，每天为用户安装360门电话．为了让用户早日用上电话，电信局只用12天时间就完成了任务．平均每天安装多少门．
<gadget id="calculator">15 / 12</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">360 * (5/4)</gadget>
<output>450</output>

<result>450</result>