The automobile factory planned to produce a batch of automobiles last year. As a result, it completed the annual plan (5/9) in the first half of the year, and completed the annual plan (3/5) in the second half of the year, with an overproduction of 3,360 vehicles. How many cars did you plan to produce last year?
汽车厂去年计划生产一批汽车，结果上半年完成全年计划的(5/9)，下半年完成全年计划的(3/5)，超产3360辆．去年计划生产汽车多少辆？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) - 1</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">(5/9) + (-2/5)</gadget>
<output>7/45 = around 0.155556</output>

<gadget id="calculator">3_360 / (7/45)</gadget>
<output>21_600</output>

<result>21_600</result>