Find equal spacing between points on a rectangle

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I'm trying to figure out how to equally space bolts around a rectangular piece of wood.

The board measures 29 7/8" tall by 24" wide. I would like a 1.25" edge margin on all sides with 6 bolts going down the long side and 5 bolts going across the shorter side.

Is there an easy way to figure spacing out to where each bolt is equally spaced around the entire board?

Thanks for any help!

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The long side measures $29.875in$, you want $1.25in$ of space either side, so you have $29.875-1.25-1.25=27.375in$ of space to share between 6 bolts. Then to spread these evenly, you divide by 5 (because you want to split up into 6 bolts, therefore 5 gaps). Here's a diagram to see what I mean: $$|-|-|-|-|-|$$ The $|$'s are the bolts, the $-$ are the distances. There are $5$ $-$'s. $$\dfrac{27.375}{5}=5.475in$$ So on the long side, they are places that far apart.

You can then do calculations similarly for the short side.