A processing factory processes 5,000 kg of rice, and 1,500 kg is processed in 3 hours. According to this calculation, how many hours will it take to process the remaining rice.
一个加工厂加工大米5000千克，3小时加工了1500千克，照这样计算，加工完剩下的大米还要多少小时．
<gadget id="calculator">5_000 - 1_500</gadget>
<output>3_500</output>

<gadget id="calculator">1_500 / 3</gadget>
<output>500</output>

<gadget id="calculator">3_500 / 500</gadget>
<output>7</output>

<result>7</result>