[填空题]
A certain pulsar, believ((slwgo8c; sned to be a neutron star of mass 1.5 qszq3b5ksqy363mg-uq *z aoac;v: j-times that of the Sun, with diameter 20 km, is observed to hav3b3 q:-kcazus j6g*o s mqqy;zvq-53ae a rotation speed of $1.0\ \text{rev/s}$. If it loses rotational kinetic energy at the rate of 1 part in $10^9$ per day, which is all transformed into radiation, what is the power output of the star? P$=$ $ \times 10^{25}\ \text{W}$
