To convert 30dm and 14cm to meters, we need to convert each unit to meters and then add them together.

1 dm = 0.1 m (since there are 10 decimeters in a meter)
1 cm = 0.01 m (since there are 100 centimeters in a meter)

So, 30dm = 30 * 0.1 = 3m
And 14cm = 14 * 0.01 = 0.14m

Adding them together, we get:
3m + 0.14m = 3.14m

Therefore, 30dm and 14cm is equal to 3.14 meters.