Hisense TV Factory plans to produce 12,000 TV sets in May, and it produced in the first ten days (2/5) and in the middle ten days (9/20). How many TV sets were produced in the first ten days and the middle ten days?
海信电视机厂五月份计划生产电视机12000台，上旬产了(2/5)，中旬产了(9/20)，上旬、中旬共生产电视机多少台？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">12_000 * (2/5)</gadget>
<output>4_800</output>

<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">12_000 * (9/20)</gadget>
<output>5_400</output>

<gadget id="calculator">4_800 + 5_400</gadget>
<output>10_200</output>

<result>10_200</result>