how to get exact longitude and lattitude from 1830.3507,N,07348.5385,E this string

The Latitude and Longitude data can be presented in a few different ways, using Degrees only, or Degrees and Minutes, or Degrees Minutes and Seconds, so your figures could mean :-

1) 18.303507 Degrees north 73.485385 Degrees East (Degrees only)
2) 18 Degrees 30.3507 Minutes North 73 Degrees 48.5385 Minutes East (D + M)
3) 18 Degrees 30 Minutes 35.07 Seconds North 73 Degrees 48 Minutes 53.85 Seconds East (D + M + S)

You can convert from D + M or D + M + S to Degrees using an on line site like this one (Click Here)

example 1) is this N18.303507 E73.485385 = Tekpole, Dighe, Khanu, Kal River
example 2) would translate from this :- N18 30.3507 E73 48.5385 into this N18.50585 E73.80898 = Kai Suresh M P Path
example 3) would translate from this :- N18 30 35.07 E73 48 53.25 into this N18.50974 E73.81496 = Paud road