We have a three molar solution where the red dots are the solid, blue dots are the solid. We want to go from a three molar to a one molar solution. So we need to ask ourselves, how many more blue dots do we need to add to go from a three molar to a one molar? So since the number of red dots stays the same, we need to find the constant. The constant here is the number of moles of solute. To find the number of moles of solute, we take 0.6 liters and we multiply it by three molar.