// NOTE: it is recommended to use this even if you don't understand the following code.

#include <iostream>
#include <string>
#include <vector>

int main() {
    // uncomment the two following lines if you want to read/write from files
    // ifstream cin("input.txt");
    // ofstream cout("output.txt");

    int Busz;
    std::cin >> Busz;

    int Ülés;
    std::cin >> Ülés;

    int Gyerekek;
    std::cin >> Gyerekek;

    std::string R = "";


    // INSERT YOUR CODE HERE


    std::cout << R;
    if(Busz*Ülés<Gyerekek){
    R="NO";
    }
    else{
    R="YES";}

    std::cout<< R;
    return 0;

}