1/8 * 4 1/2 * + 3/8 * 4 1/2 + 4 1/2 * 1/2

Answer 1

fixing the *+ typo, I get
1/8 * 4 1/2 + 3/8 * 4 1/2 + 4 1/2 * 1/2 = 4 1/2
that's just
(1/8 + 3/8 + 1/2) * 4 1/2 = 1 * 4 1/2