There are 300 kilograms of apples in the store, and there are a kilograms of apples in each basket. After selling 8 baskets, how many kilograms are left.
商店里有300千克苹果，每筐苹果有a千克，卖出8筐后，还剩多少千克．
<gadget id="calculator">300 - 8</gadget>
<output>292</output>

<result>292</result>