Dongfeng Chemical Fertilizer Plant calculated to produce 28 million bags of fertilizer in September, but actually completed 59% of the plan in the first half of the month, and 65% of the plan in the second half of the month. How many bags of chemical fertilizers are over-produced in the whole month?
东风化肥厂九月份计算生产化肥2800万袋，实际上半月完成计划的59%，下半月完成计划的65%．全月超额生产化肥多少袋？
<gadget id="calculator">59 / 100</gadget>
<output>59/100 = around 0.59</output>

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

<gadget id="calculator">(59/100) + (13/20)</gadget>
<output>31/25 = around 1.24</output>

<gadget id="calculator">2_800 * (31/25)</gadget>
<output>3_472</output>

<gadget id="calculator">3_472 - 2_800</gadget>
<output>672</output>

<result>672</result>