Lumber is sold in cubic meters, denoted as M3.
For measurements less than 1M3, the measurement is given in cubic decimeters. Dm3. is displayed as. There are 1000 cubic decimeters in 1m3.
According to this
Here it is cut in standard sizes. However, the dimensions are kept a little large considering that the timber will dry out.
1 m3 = 1000 dm3
1,7 m3 = 1700 dm3
0,236 m3 = 236 dm3