Va rog este urgent dau coroanaaa

Răspuns:
3,81hm=3810dm
5,7dm=57cm
300mm=0,03dam
570m=5,7hm
7,8dam=780dm
3,8dm=0,0038hm
68km=6800dam
3m=0,03hm
200km=2000hm
7mm=0,0007dam
9,72cm=97,2mm
0,0004km=40cm