How to create a evenly spaced grid of rectangles

Ok Im having difficulty in creating 5x5 rectangles with rounded corners, which themselves have a specific height and width and the spacing (rows and columns) inbetween are evely spaced.
How would i acheive this???

Thanks for the replies.
I had actually tried Steve Fairbank's method before posting this thread, however it would you would have to set the area and thw shape width seperately f.e. if i were to set the height and width and the spacing, the overall area wouldnt expand to compensate but rather stay the same, if i then increase the area it would mess up either the spacing or the width and height. Very Frustrating. a
Anyway I have achieved what i wanted using Larry G. Schneider's method.
I have one more question now at this point:
Do you know how to manipulate the spacing between the shapes so that there is even spacing in the rows and columns between the shapes?? Doing this whilst using your method i found was hit and miss and i only got it roughly right.
Thanks

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