You Do Need power plug adapter while traveling from Åland Islands to Malaysia.

Here is Why You Need An Adapter

The outlet and plug type used in Malaysia is G and in Åland Islands are C and F. This is how they look like.

Åland Islands

In Åland Islands, outlets of type C and F are in use.

Type C

Type F

Malaysia

In Malaysia, outlets of type G are in use.

Type G