Evaluate sin(20∘)sin(40∘)sin(80∘)\sin(20^\circ)\sin(40^\circ)\sin(80^\circ)sin(20∘)sin(40∘)sin(80∘).
3/8\sqrt{3}/83/8
3/4\sqrt{3}/43/4
1/81/81/8
1/41/41/4