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)
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)