There are 280 kg of rice in the cafeteria. I plan to eat it for 7 days, but I actually eat 5 kg less than the plan every day. How many days did I actually eat this batch of rice?
食堂有280千克大米，计划吃7天，实际每天比计划少吃5千克，这批大米实际吃了多少天？
<gadget id="calculator">280 / 7</gadget>
<output>40</output>

<gadget id="calculator">40 - 5</gadget>
<output>35</output>

<gadget id="calculator">280 / 35</gadget>
<output>8</output>

<result>8</result>