It depends on the size of the square!
The question is like asking how many lengths in a line - or, as it is more often put - how long is a piece of string?
PS: Thank you for giving me the opportunity to use that phrase in an answer.
9C square units
There are: 13*19 = 247 square units
13*9 = 117 square units
There are: 13*9 = 117 square units
13 x 9 = 117 square units
9C square units
There are: 13*9 = 117 square units
Tere are 117 square units
That's 117 square units.
There are: 13*19 = 247 square units
There are: 13*19 = 247 square units
13*9 = 117 square units
There are: 13*9 = 117 square units
Multiply 13 by 9 and you get 117 square units.
13 x 9 = 117 square units
13*9 = 117 square units
You take the product of the office's dimensions: 13 units x 9 units = 117 square units. The answer is 117 square units.