The canteen shipped 7,000 kilograms of rice, 500 kilograms less than 2.5 times the amount of flour delivered. How many kilograms of flour was delivered?
食堂运来大米7000千克，比运来面粉的2.5倍少500千克，运来面粉多少千克？
<gadget id="calculator">7_000 - 500</gadget>
<output>6_500</output>

<gadget id="calculator">6_500 / 2.5</gadget>
<output>2_600</output>

<result>2_600</result>