I am having trouble figuring out the below problems.

1. 380 dm= m
2. 90.51L= cL
3. 450mg= g

Please help me figure out the below

d: multiply by 0.1

so, 380dm = 3.80m

1 cL = 1/100 L, so 1L = 100cL

1g = 1000mg, so 1mg = 0.001g