First, you have to compare same unit of measurement for uniformity. Convert feet to inches, knowing that 1 foot is equal to 12 inches.
3*12 = 36 inches
Each square brick is 3 inches wide. Divide the whole width of the path by the width of each brick to obtain the number of bricks:
36/3 = 12
Thus, there are 12 bricks in the path.
