You Do Need power plug adapter while traveling from Finland to Myanmar (Burma).

Here is Why You Need An Adapter

The outlet and plug type used in Myanmar (Burma) are A, C, D, G and I and in Finland are C and F. This is how they look like.

Finland

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

Type C

Type F

Myanmar (Burma)

In Myanmar (Burma), outlets of type A, C, D, G and I are in use.

Type A

Type C

Type D

Type G

Type I