How long did it take you to do them calculations? seems like a bit of an inefficient use of your time. Or maybe that's your hobbies, fair enough then
"Get a life," is what you're saying. That's fairly rude and dismissive. Shame on you.
And FYI it took 10 seconds to figure out. 365.25*24*60 = minutes per year, and 400 billion divided by that result.