Three warehouses, A, B, and C, each store the same amount of rice. With a belt conveyor and 12 workers, the rice in warehouse A can be moved in 5 hours; with a belt conveyor and 28 workers, the rice in warehouse B can be moved in 3 hours; there are currently 2 If it takes exactly 2 hours for the belt conveyor to move the rice in Warehouse C, how many workers are needed to carry it at the same time? (Each worker has the same work efficiency per hour, and each belt conveyor has the same work efficiency per hour. In addition, the belt conveyor and workers carry rice together)
甲、乙、丙三个仓库，各存放着数量相同的大米．用一台皮带输送机和12个工人，5小时可将甲仓库里的大米搬完；用一台皮带输送机和28个工人，3小时可将乙仓库内的大米搬完；现有2台皮带输送机，如果恰好用了2小时要将丙仓库内的大米搬完，还需要多少个工人同时搬运？(每个工人每小时工效相同，每台皮带输送机每小时工效也相同，另外皮带输送机与工人一起往外搬运大米)
<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">84 - 60</gadget>
<output>24</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">2 * 2 * 12</gadget>
<output>48</output>

<gadget id="calculator">60 - 48</gadget>
<output>12</output>

<gadget id="calculator">60 + 12</gadget>
<output>72</output>

<gadget id="calculator">72 / 2</gadget>
<output>36</output>

<result>36</result>