docs for h3CellAreaM2

docs/en/sql-reference/functions/geo/h3.md

@@ -808,4 +808,40 @@ Result:
 └─────────┘
 ```
 
+## h3CellAreaM2 {#h3cellaream2}
+
+Returns the exact area of a specific cell in square meters corresponding to the given input H3 index.
+
+**Syntax**
+
+``` sql
+h3CellAreaM2(index)
+```
+
+**Parameter**
+
+-   `index` — Hexagon index number. Type: [UInt64](../../../sql-reference/data-types/int-uint.md).
+
+**Returned value**
+
+-   Cell area in square meters.
+
+Type: [Float64](../../../sql-reference/data-types/float.md).
+
+**Example**
+
+Query:
+
+``` sql
+SELECT h3CellAreaM2(579205133326352383) AS area;
+```
+
+Result:
+
+``` text
+┌───────────────area─┐
+│ 4106166334463.9233 │
+└────────────────────┘
+```
+
 [Original article](https://clickhouse.com/docs/en/sql-reference/functions/geo/h3) <!--hide-->