One gigalitre is equal to 1,000,000,000 (one billion) litres.
There are 0.000001 gigaliters (1 x 10^-6) in one liter.
8.17 gigaliters = 8.17 billion liters.
20 gigalitres = 20,000 mega litres
1 gigalitre = 1000 megalitres. You now have all the information required to work out, for yourself, the answer to this and similar questions.
Multiply by one billionth.
1 liter
2
10,000
how many cups of water in a liter
1000
0.4 liter
1000 ml