Android Question I need seconds to days conversion

Sub ConvertSecondsToDays(NumSeconds As Long) As Double

    '''Return NumSeconds / 60 / 60 / 24    'long but self-explanatory way
    Return NumSeconds / 86400

End Sub

Sub ConvertMillisecondsToString(t As Long) As String
    Dim days, hours, minutes, seconds As Long
    days = t / DateTime.TicksPerDay
    hours = (t Mod DateTime.TicksPerDay) / DateTime.TicksPerHour
    minutes = (t Mod DateTime.TicksPerHour) / DateTime.TicksPerMinute
    seconds = (t Mod DateTime.TicksPerMinute) / DateTime.TicksPerSecond
    
    Return $"$1.0{days}:$2.0{hours}:$2.0{minutes}:$2.0{seconds}"$
        
End Sub

Sub ConvertSecondsToComponents(S As Long) As Int()    'days, hours, minutes, seconds

    Dim NumDays As Int = S / 86400
    S = S - NumDays * 86400

    Dim NumHours As Int = S / 3600
    S = S - NumHours * 3600

    Dim NumMinutes As Int = S / 60
    S = S - NumMinutes * 60

    Dim NumSeconds As Int = S

    Return Array As Int(NumDays, NumHours, NumMinutes, NumSeconds)
   
End Sub

Sub ConvertSecondsToString(S As Long) As String    'D:HH:MM:SS

    Dim TC() As Int = ConvertSecondsToComponents(S)
 
    Return $"$1.0{TC(0)}:$2.0{TC(1)}:$2.0{TC(2)}:$2.0{TC(3)}"$

End Sub