We have to convert here deciliters into liters here.
The conversion can be done as follows:
1 deciliter = 0.1 liters
Using this to convert 4.5 deciliters into liters.
We will use unitary method here.
1 deciliter of milk equals 0.1 liters.
So 4.5 deciliters of milk = 0.1 *4.5 = 0.45 liters of milk.
Answer : 0.45 liters of milk is needed for the cake recipe.