Original sentence: In Perm Krai is about 40 river what have lenght from 100km (62mi) to 500km (310mi).Inva River — 257km (159mi).It is Kama River(1805km (1120mi)) and Chusovaya River (592km (367mi)).Kolva River — 460km (285mi).Kosa River — 267km (165mi).Kosva River — 283km (176mi).Length from north to south - 645 km;.Obva River — 247km (153mi).Only two river in Perm Krai have length more than 500km.Small rivers (length below 100km (62mi)) is majority of the rivers of Perm Krai.Sylva River — 493km (306mi).Total length of all rivers is more than ninety thousand kilometers (~55862 mi).Veslyana River — 266km (165mi).Vishera River — 415km (258mi).Yayva River — 403km (250mi).length from west to east - 417.5 km
Edited sentence: In Perm Krai is about 40 river what have length from 100 km (62 mi) to 500 km (310 mi).Inva River — 257 km (159 mi).It is Kama River(1805 km (1120 mi)) and Chusovaya River (592 km (367 mi)).Kolva River — 460 km (285 mi).Kosa River — 267 km (165 mi).Kosva River — 283 km (176 mi).Length from north to south - 645 km;.Obva River — 247 km (153 mi).Only two river in Perm Krai have length more than 500 km.Small rivers (length below 100 km (62 mi)) is majority of the rivers of Perm Krai.Sylva River — 493 km (306 mi).Total length of all rivers is more than ninety thousand kilometers (~55862 mi).Veslyana River — 266 km (165 mi).Vishera River — 415 km (258 mi).Yayva River — 403 km (250 mi).length from west to east - 417.5 km