Question
Mr Yang's car was left with 16 fuel. He added 6 ℓ of fuel to his car, it became 512 full. How much more fuel was needed to fill up Mr Yang's car?
4 m

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Mr Yang's car was left with 16 fuel. He added 6 ℓ of fuel to his car, it became 512 full. How much more fuel was needed to fill up Mr Yang's car?