def main():

    A, V = list(map(int, input().split()))

    B, W = list(map(int, input().split()))

    T = int(eval(input()))



    if A == B:

        print('YES')

        return



    d = abs(A - B)

    dv = V - W



    if d <= dv * T:

        print('YES')

    else:

        print('NO')

    return





if __name__ == '__main__':

    main()



# import sys

# input = sys.stdin.readline

#

# sys.setrecursionlimit(10 ** 7)

#

# (int(x)-1 for x in input().split())

# rstrip()

#

# def binary_search(*, ok, ng, func):

#     while abs(ok - ng) > 1:

#         mid = (ok + ng) // 2

#         if func(mid):

#             ok = mid

#         else:

#             ng = mid

#     return ok

def main():

    A, V = list(map(int, input().split()))

    B, W = list(map(int, input().split()))

    T = int(eval(input()))



    d = abs(A - B)

    s = V - W

    print(('YES' if T * s >= d else 'NO'))





if __name__ == '__main__':

    main()

def main():
    A, V = list(map(int, input().split()))
    B, W = list(map(int, input().split()))
    T = int(eval(input()))
    if A == B:
        print("YES")
        return
    d = abs(A - B)
    dv = V - W
    if d <= dv * T:
        print("YES")
    else:
        print("NO")
    return


if __name__ == "__main__":
    main()
# import sys
# input = sys.stdin.readline
#
# sys.setrecursionlimit(10 ** 7)
#
# (int(x)-1 for x in input().split())
# rstrip()
#
# def binary_search(*, ok, ng, func):
#     while abs(ok - ng) > 1:
#         mid = (ok + ng) // 2
#         if func(mid):
#             ok = mid
#         else:
#             ng = mid
#     return ok

def main():
    A, V = list(map(int, input().split()))
    B, W = list(map(int, input().split()))
    T = int(eval(input()))
    d = abs(A - B)
    s = V - W
    print(("YES" if T * s >= d else "NO"))


if __name__ == "__main__":
    main()

-    if A == B: -        print("YES") -        return -    dv = V - W -    if d <= dv * T: -        print("YES") -    else: -        print("NO") -    return +    s = V - W +    print(("YES" if T * s >= d else "NO")) -# import sys -# input = sys.stdin.readline -# -# sys.setrecursionlimit(10 ** 7) -# -# (int(x)-1 for x in input().split()) -# rstrip() -# -# def binary_search(*, ok, ng, func): -#     while abs(ok - ng) > 1: -#         mid = (ok + ng) // 2 -#         if func(mid): -#             ok = mid -#         else: -#             ng = mid -#     return ok