spheer with wide=8000 mile...so radius=4000mile
volume=(4/3)*pi*rad^3
=268,082,573,1006.32898 kubik mile
1 mile=5,280 ft, so 1 kubik mile=5,280^3 kubik ft=147,197,952,000
so spheer vol...multipli abuv 2 numbers
me get 3.9461205727303453*10^23 (e+23)
1 kubik foot=7.480681 gallon
=2.951966919213301 e+24 gallons