Yes, 2m 3dm is equal to 203 centimeters. Here's why:

* 1 meter (m) = 100 centimeters (cm)

* 1 decimeter (dm) = 10 centimeters (cm)

Therefore:

* 2 meters = 2 * 100 cm = 200 cm

* 3 decimeters = 3 * 10 cm = 30 cm

Adding these together: 200 cm + 30 cm = 230 cm