A production workshop completed 75% of the weekly plan in the first 3 days, and if it produced 1600 parts in the next 2 days, it could overproduce 200 parts. How many parts did the production workshop originally plan to produce?
某生产车间前3天完成了一周计划的75%，如果后2天再生产1600个零件，就可超产200个．这个生产车间原计划生产零件多少个？
<gadget id="calculator">1_600 - 200</gadget>
<output>1_400</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1_400 / (1/4)</gadget>
<output>5_600</output>

<result>5_600</result>