Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Region | Land area (km 2 ) | Rainfall by depth (mm/year) | Rainfall by volume (km 3 /year) | Surface run off (km 3 /year) | Infiltration (km 3 /year) | Evapotranspiration (km 3 /year) |
| --- | --- | --- | --- | --- | --- | --- |
| Chorotega | 9,552.4 | 2006.0 | 19.2 | 5.7 | 3.5 | 10.3 |
| Huetar Norte | 9,001.5 | 3527.0 | 31.8 | 14.9 | 9.6 | 7.5 |
| Huetar Atlántico | 9,688.5 | 3933.0 | 38.1 | 17.6 | 9.3 | 11.1 |
| Pacífico Central | 4,722.9 | 2801.0 | 13.2 | 5.2 | 2.2 | 4.9 |
| Central | 8,543.2 | 3461.0 | 29.6 | 13 | 7 | 8.6 |
| Brunca | 9,294.5 | 3809.0 | 35.4 | 18.6 | 5.6 | 12.2 |
Question:
What was the rainfall by volume in Huetar Atlantico where the rainfall depth (mm/year) was 3527?
Answer:
31.8