The table lists the number of the twenty-five largest seawater-desalination plants operating worldwide in 2022, categorized by location and maximum daily output.
| Region | Low | Medium | High | Total |
|---|---|---|---|---|
| Middle East | 1 | 2 | 3 | 6 |
| North America | 3 | 2 | 1 | 6 |
| Europe | 2 | 1 | 1 | 4 |
| Asia–Pacific | 2 | 1 | 2 | 5 |
| Africa | 1 | 1 | 0 | 2 |
| South America | 1 | 0 | 1 | 2 |
| Total | 10 | 7 | 8 | 25 |
The combined maximum daily output of the six Middle East plants is 580 million liters. The combined maximum daily output of all twenty-five plants is 1,920 million liters.
If each of the six Middle East plants operated at its maximum rate every day for 30 consecutive days, approximately how many billion liters of freshwater would they produce during that period?