Question
Yoko combined 2 bottles of the starfruit juice to make starfruit punch for her colleagues at a parade. Each bottle had 390 mℓ of the starfruit juice. After the parade, 330 mℓ of starfruit punch was left. How much starfruit punch did her colleagues drink in mℓ?
4 m

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Yoko combined 2 bottles of the starfruit juice to make starfruit punch for her colleagues at a parade. Each bottle had 390 mℓ of the starfruit juice. After the parade, 330 mℓ of starfruit punch was left. How much starfruit punch did her colleagues drink in mℓ?