2м 6дм 30дм

To convert the measurements into a uniform unit, we can convert everything to decimeters (dm).

1. Convert 2 meters to decimeters:
   Since 1 meter = 10 decimeters,
   2 meters = 2 * 10 = 20 dm.

2. Convert 6 decimeters to decimeters:
   This is already in decimeters, so it remains 6 dm.

3. 30 decimeters remains the same.

Now we add all the measurements together in decimeters:

\[ 20 \, \text{dm} + 6 \, \text{dm} + 30 \, \text{dm} = 56 \, \text{dm} \]

So, the total length is 56 decimeters.