A mobile phone manufacturer originally planned to produce 1,600 mobile phones in 5 days, but actually completed the task in 4 days. How many more phones were actually produced per day than originally planned?
某手机生产厂原计划5天生产完手机1600部，实际4天就完成了任务，实际每天比原计划多生产多少部？
<gadget id="calculator">1_600 / 4</gadget>
<output>400</output>

<gadget id="calculator">1_600 / 5</gadget>
<output>320</output>

<gadget id="calculator">400 - 320</gadget>
<output>80</output>

<result>80</result>