Bromine is used to prepare the pesticide methyl bromide and flame retardants for plastic electronic housings. It is recovered from seawater, underground brines, and the Dead Sea. The average concentrations of Bromide in sea water(d=1.024g/ml) and the Dead Sea(d=1.22g/ml) are 0.065 g/l and 0.50 g/l. What is the mass ratio of bromine in the dead sea to that in sea water?