Calculate number of patches out of patch extraction algorithm

How could I calculate the number of exported patches giving the following numbers:

1) Image size: 1024 x 768

2) Patch size: 32

3) Stride: 4

Thank you

PS I found out a formula [1 + ((Ιm_W - p_size)/stride)] x [1 + ((Ιm_H - p_size)/stride)]

Hope that is correct