#include<stdio.h>
#include<stdlib.h>

int main(){

  long long int n, k, t;

  scanf("%lld %lld %lld", &n, &k, &t);
  
  n = abs(n);

  if(n > k * t){
    printf("No\n");
  }
  else{
    printf("Yes\n");
  }
  
  return 0;
}