The store prepared 400 ml of concentrated disinfectant solution, added 2000 ml of water to make a disinfectant solution, and then divided it into four potions. How many milliliters of disinfectant solution is in each barrel on average?
商店里准备了400毫升的浓缩消毒液，加入2000毫升清水制成消毒液药水后将其分装入四个药水桶中，平均每桶装多少毫升消毒药水？
<gadget id="calculator">2_400 / 4</gadget>
<output>600</output>

<result>600</result>