The three workshops jointly produce a batch of parts, the first workshop produces 600 pieces, the second workshop produces the remaining 20%, and the third workshop is exactly half of this batch of parts. How many pieces are produced in total by the second and third workshops?
三个车间共同生产一批零件，第一车间生产600个，第二车间生产的是余下的20%，第三车间正好是这批零件的一半，第二、三车间共生产多少个？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<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">(1/2) / (4/5)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">600 / (3/8)</gadget>
<output>1_600</output>

<gadget id="calculator">1_600 - 600</gadget>
<output>1_000</output>

<result>1_000</result>