After pouring 5 kg of the oil in barrel A into barrel B, the two barrels of oil are now the same weight, then how many kilograms of oil is in barrel A than in barrel B?
把甲桶中的油向乙桶中倒入5千克后，两桶油现在同样重，则甲桶原来比乙桶中的油多多少千克．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>