The canteen shipped 24 bags of flour, each bag 25 kg. I have eaten 280 kilograms, how many kilograms are left?
食堂运来24袋面粉，每袋25千克．已经吃了280千克，还剩下多少千克？
<gadget id="calculator">25 * 24</gadget>
<output>600</output>

<gadget id="calculator">600 - 280</gadget>
<output>320</output>

<result>320</result>