Vă rooog repedee !!! :(/

57 hm= 570 dam
390 dam= 39 hm
107 hm= 1070 dam
7900 dam=79 km
330 km= 33000 dam
800 km=8 dam
25 km=25000 m
890 km=890000 m
6000 m= 6 km
230 hm=23 km
450 km=4500 hm
907 km=9070 hm