The machine tool factory planned to produce 400 machine tools in May, but actually completed 55% of the plan in the first half of the month, and 65% of the plan in the second half of the month. How many units were actually produced more than planned?
机床厂五月份计划生产机床400台，实际上半月完成计划的55%，下半月完成计划的65%．实际比计划超产多少台？
<gadget id="calculator">55 / 100</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">(11/20) + (13/20)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">400 * (6/5)</gadget>
<output>480</output>

<gadget id="calculator">480 - 400</gadget>
<output>80</output>

<result>80</result>