[填空题]
Calculate the moment of inenn3/yg ld)1 xhrtia on l8be4l*cbo7 xlb9pt6ff n(/f a bicycle wheel 66.7 cm in diameter. The rim and tire have a combined mass of 1.ol(*4 tle8bpf b9xc/6l 7fn nb25 kg. The mass of the hub can be ignored (why?). $kg \cdot m^2$