All you need to do is multiply the number of managers(210,000) by the number of dollars each one makes(39000). The answer would be $819,000,000 a year. You would not divide, just multiply the numbers.
The number of subsets of a set is 256, and the number of subsets of a set is 128. If | ∪ | = 2 × | ∩ |, then what is the value of | ∩ |? and what will be the number of subsets of the set ∩ ?