A machinery factory processes a batch of parts. The first workshop processed (3/5) of these parts, and the second workshop processed (5/8) of these parts. The result was an overproduction of 450. How many machine parts does the factory plan to process? ?
某机械厂加工一批零件，第一车间加工了这些零件的(3/5)，第二车间加工了这批零件的(5/8)，结果超产450个，这个厂计划加工多少个机器零件？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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

<gadget id="calculator">(3/5) + (-3/8)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">450 / (9/40)</gadget>
<output>2_000</output>

<result>2_000</result>