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son 8 lapices.
12l___€4
8l____€X
8×4÷12= 2,6
cuetsn €2,6
4 € / 12 = 0.333 valor de cada lápiz
2/3 x 12 = 8 lápices (dos tercios)
8 x 0.333 = 2.666 € (valor de los 8 lápices)