[填空题]
Calculate the moment9 .wq0z3zst eod(foxsb5f3 v1vnew38 um42xykf 3+pe44 ,nqk0 (wckwmnoej1of inertia of a bicycle wheel 66.7 cm in diameter. The rim and tire have y4qx k n3(ejw1 2em,wnk+pfu4kco0m4a combined mass of 1.25 kg. The mass of the hub can be ignored (why?). $kg \cdot m^2$