objective c - i get data in meter in nsnumber from api but how will i convert it into km -

my code below

nsnumber *somenumber = [[_dict2 objectforkey:@"location"] objectforkey:@"distance"];  nsstring *somestring = [somenumber stringvalue]; _lbldistance.text=somestring; 

if want include km in string use nslengthformatter

nsnumber *somenumber = @1568; nslengthformatter *formatter = [[nslengthformatter alloc] init]; nsstring *distanceinkm = [formatter stringfrommeters:somenumber.doublevalue]; nslog(@"%@", distanceinkm); // 1.568 km