So the first one is 1 square meter of ceiling, and it says 1 square meter of cieling is 10.75. So the first one is just that, 10.75
The second one says 10 square meters, so just multiply 10.75, by 10.
In which case you get 107.5. So that's the answer.
Third one, it gives you how many ceiling tiles you have. So you divide the 100 tiles by 10.75, which gives you 9.30232558, which becomes 9.3
I'm sure you can figure out the last one.
