A grain processing factory has 2 identical flour mills, which can grind 2184 kg of flour in 3 hours. There are currently 5 such flour mills, how many hours will it take to grind 12,740 kilograms of flour?
一个粮食加工厂有2台同样的磨面机，3小时可以磨面粉2184千克．现有5台这样的磨面机，要想磨面粉12740千克，需要几小时？
<gadget id="calculator">2_184 / 3 / 2</gadget>
<output>364</output>

<gadget id="calculator">364 * 5</gadget>
<output>1_820</output>

<gadget id="calculator">12_740 / 1_820</gadget>
<output>7</output>

<result>7</result>