[填空题]
When our Sun becomes a r (by9q -mfwpdw5kj0:yed giant, w (i1h+zeabk q/k/o3:6 cbkyuchat will be its average density if it expands out to thb: 63 e+ihockkz/1 u yk/caq(be orbit of Earth ($1.5 \times 10^{11}\ \text{m}$ from the Sun)? $\rho = $ $ \times 10^{-4}\ \text{kg/m}^3$
