suppose you want to create two photographs with the same brightness in different depths of field. You keep all camera parameters the same except for...

suppose you want to create two photographs with the same brightness in different depths of field. You keep all camera parameters the same except for the exposure time and the F number. Your first photograph has an exposure time of 10 ms and an f-stop of f/1.4. your second photograph has an f-stop of f/22. how long was the exposure time on the second photograph be to ensure the second photograph is equally bright as the first?