Two barrels of oil, A and B, weigh 40 kg in total, and the weight of oil in barrel A is 60% of that in barrel B. How many kilograms is a barrel of oil?
甲、乙两桶油共重40千克，甲桶油的重量是乙桶油的60%．乙桶油有多少千克？
<gadget id="calculator">40 / 1.6</gadget>
<output>25</output>

<result>25</result>