r = 6378000 # meters
M = 5.97E24 # kg

omega = (2 * pi) / (60*60*24)
print omega

I = 0.4 * r**2 * M
print I # unit is m**2 * kg

L = I * omega
print L # unit is m**2 * kg * rad/s

# change some variables and redo it.