After taking out 4 apples from basket A and putting them into the basket, the number of apples in the two baskets is equal, how many apples are the original difference between the two baskets of A and B?
从甲筐取出4个苹果放入筐后，两筐苹果数相等，甲乙两筐原来相差多少个个苹果．
<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<result>8</result>