I think I get what you're aiming at in your explanation, but you're not being quite explicit enough about how those shifts map to multiplications, and having to assume a world where 1 >> 1 is 0.5 is... consistent, but counterintuitive.

But I think what you're aiming to say is:

r << 5 | r << 2 | r >> 1 amounts (because r is constrained to three bits) to being the same as

r << 5 + r << 2 + r >> 1

And r << 5 is r * 32, r << 2 is r * 4, and r >> 1 is floor(r / 2)

So the whole thing is

r * 32 + r * 4 + floor(r * 0.5)

which is the same as

floor(r * 32 + r * 4 + r * 0.5)

or

floor(r * 36.5)