Container A holds 4000 ml of water, container B contains twice as much water as container A, how many liters of water does container B hold?
甲容器盛水4000毫升，乙容器盛水量是甲的2倍，乙容器盛水多少升．
<gadget id="calculator">4_000 * 2</gadget>
<output>8_000</output>

<gadget id="calculator">8_000 / 1_000</gadget>
<output>8</output>

<result>8</result>