A bicycle factory planned to produce 12,600 bicycles last year, but completed 55% of the plan in the first half of the year, and 60% of the plan in the second half of the year. How many more bicycles were actually produced than planned?
某自行车厂去年计划生产自行车12600辆，结果上半年完成计划的55%，下半年完成计划的60%，实际比计划多生产了多少辆？
<gadget id="calculator">55 / 100</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) - 1</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">(11/20) + (-2/5)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">12_600 * (3/20)</gadget>
<output>1_890</output>

<result>1_890</result>