Container A can hold 250 ml of water, which is 80 ml less than container B, and container C has twice the capacity of container B. How many milliliters of water can the C container hold?
甲容器可以盛水250毫升，比乙容器少盛水80毫升，丙容器的容量是乙容器的2倍．丙容器可盛水多少毫升？
<gadget id="calculator">250 + 80</gadget>
<output>330</output>

<gadget id="calculator">330 * 2</gadget>
<output>660</output>

<result>660</result>