Reina is buying a house either with brick or with siding, with 1 floor or with 2 floors, and in the city, the suburbs, or the country. On top of that, she can choose from 6 different interior paints and 9 different exterior paints.

Using the fundamental counting principle, simplify the expression to determine the number of possible combinations.

There are possible combinations.

Reina decides she definitely wants a brick house with one floor. Now the number of possible combinations is