A batch of parts was planned to be produced in April. In fact, 60% of the plan was completed in half a month, and in the second half of the month (5/8), 450 parts were overfulfilled. How many parts are planned to be produced in April?
四月份计划生产一批零件，实际上半月完成了计划的60%，下半月完成计划的(5/8)，超额完成450个，四月份计划生产多少个零件？
<gadget id="calculator">60 / 100</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>