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

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

T=int(eval(input()))

if W>=V:

  print("NO")

else:

  if abs(A-B)/(V-W)<=T:

    print("YES")

  else:

    print("NO")
A,V=list(map(int,input().split()))

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

T=int(eval(input()))

if W>=V:

  print("NO")

else:

  if abs(A-B)<=(V-W)*T:

    print("YES")

  else:

    print("NO")
A, V = list(map(int, input().split()))
B, W = list(map(int, input().split()))
T = int(eval(input()))
if W >= V:
    print("NO")
else:
    if abs(A - B) / (V - W) <= T:
        print("YES")
    else:
        print("NO")

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

-    if abs(A - B) / (V - W) <= T: +    if abs(A - B) <= (V - W) * T: