Question
At first, Barrel U and Barrel V contained 0.3 ℓ and 4.4 ℓ of water respectively. Some water from Barrel V was poured into Barrel U with no water spilling over. In the end, there was as much water in Barrel U as in Barrel V. How much water was poured from Barrel V to Barrel U?
3 m

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At first, Barrel U and Barrel V contained 0.3 ℓ and 4.4 ℓ of water respectively. Some water from Barrel V was poured into Barrel U with no water spilling over. In the end, there was as much water in Barrel U as in Barrel V. How much water was poured from Barrel V to Barrel U?