Imports System

Module Program
    Sub Main(args As String())
        Dim sInputA As String() = Console.ReadLine().Split(" ")
        Dim sInputB As String() = Console.ReadLine().Split(" ")
        Dim sInputT As Long = Console.ReadLine()
        Dim iPositionA As Long = Long.Parse(sInputA(0))
        Dim iSpeedA As Long = Long.Parse(sInputA(1))
        Dim iPositionB As Long = Long.Parse(sInputB(0))
        Dim iSpeedB As Long = Long.Parse(sInputB(1))

        If (iPositionA + (iSpeedA * sInputT)) >= (iPositionB + (iSpeedB * sInputT)) Then
            Console.WriteLine("Yes")
        Else
            Console.WriteLine("No")
        End If

    End Sub
End Module
