function Main(input) {
	var str = input;
	var ans = "";
	var str = str.split("\n");
	var num1 = str[0].split(" ");
	var num2 = str[1].split(" ");
	var num3 = str[2].split(" ");
	var a = Number(num1[0]);	
	var v = Number(num1[1]);
	var b = Number(num2[0]);	
	var w = Number(num2[1]);	
	var t = Number(num3[0]);	
 	var k = Math.abs(b-a);
 	if(v > w){//追いつく
 		var m = v-w;	
 			if(t >= k/m){
 				ans = "YES";
		 	}else{
		 		ans = "NO";
		 	}
 		}else{//追いつかない
 			ans = "NO";
		} 		
	console.log(ans);
	}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));