The canteen shipped 420 kg of flour, and the rice shipped was 140 kg more than the flour. If 80 kilograms of rice are used every day, how many days will this batch of rice be enough for?
食堂运来面粉420千克，运来的大米比面粉多140千克．如果每天用掉80千克大米，这批大米够用几天？
<gadget id="calculator">420 + 140</gadget>
<output>560</output>

<gadget id="calculator">560 / 80</gadget>
<output>7</output>

<result>7</result>