I want to know how many bricks are in a cubic meter? For example, 200 * 119 * 115

I want to know how many bricks are in a cubic meter? For example, 200 * 119 * 115

Assuming the mortar joint thickness of brick masonry is a, the brick consumption of a cubic brick masonry is: 1 / [(0.2 + a) * (0.119 + a) * (0.115 + a)]