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Shirley distributed all the olive oil from a tank into container A, container B and 20 bottles.
She poured `4/9` of the olive oil into container A, `3/7` of the remaining olive oil into container B and the rest of the olive oil into 20 bottles.
She poured 1.8 l of olive oil into each bottle.
How much more olive oil did she pour into the container A than the container B?
Notes to students: