The three workshops produced a batch of parts. After the first workshop produced a part, the second workshop produced 20% of the remaining 20% of the first workshop, and the third workshop produced 800 pieces, just in time to complete the task. The second and third workshops produced a total of parts how many?
三个车间生产一批零件，第一车间生产了一部分后，第二车间生产的是第一车间余下的20%，第三车间生产了800个，正好完成任务，第二、三车间共生产零件多少个？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">800 / (4/5)</gadget>
<output>1_000</output>

<result>1_000</result>