'use strict';
function Main(stdin){
  const input = stdin.trim().split(/\r?\n/g);
  const A_V= input[0].split(' ').map(str => BigInt(str));
  const A = A_V[0], V = A_V[1];
  const B_W= input[1].split(' ').map(str => BigInt(str));
  const B = B_W[0], W = B_W[1];
  const T = BigInt(input[2]);
  let result = 'NO';
  let kyori;
  const tidimu = V > W ? V - W : W - V;

  if(A > 0 && B < 0){
    kyori = A + BigInt(String(B).slice(1));
  } else if(A < 0 && B > 0){
    kyori = B + BigInt(String(A).slice(1));
  } else {
    kyori = A - B;
    if(kyori < 0) kyori = BigInt(String(kyori).slice(1));
  }

  if(tidimu * T > kyori) result = 'YES';
  console.log(result);
}

// 固定
Main(require("fs").readFileSync("/dev/stdin", "utf8"));