Question
Mr Chau's lorry was left with 14 fuel. He added 20 ℓ of fuel to his lorry, it became 512 full. How much more fuel was needed to fill up Mr Chau's lorry?
4 m

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Mr Chau's lorry was left with 14 fuel. He added 20 ℓ of fuel to his lorry, it became 512 full. How much more fuel was needed to fill up Mr Chau's lorry?