
#include<bits/stdc++.h>


using namespace std;

using ll   = long long;
using ii   = pair   < int , int >;
using i3   = pair   < int , ii  >;
using li   = pair   < ll  , int >;
using lii  = pair   < ll  , ii  >;
using pll  = pair   < ll  , ll  >;
using vi   = vector < int       >;
using vl   = vector < ll        >;
using vii  = vector < ii        >;
using vli  = vector < li        >;
using vpll = vector < pll       >;
using vi3  = vector < i3        >;
using vlii = vector < lii       >;


const int N = 2e5 + 5;
const ll INF = 1e17 + 7;
const double eps = 1e-9 , PI = acos(-1);



int n , m;


void solve(int testCase){

    double d , t , s;
    scanf("%lf %lf %lf" , &d , &t , &s);

    if(s * t >= d) {
            printf("Yes\n");
    }
    else {
            printf("No\n");
    }
}

main(){

    int t = 1;
    // scanf("%d" , &t);

    for(int testCase = 1 ; testCase <= t ; testCase ++){
            solve(testCase);
    }

    return 0;
}

#include <bits/stdc++.h>
#define rep(i, n, m) for (int i = (int)(n); i < (int)(m); i++)
#define repr(i, n, m) for (int i = (int)(n) - 1; i >= (int)(m); i--)
using namespace std;
using ll = int64_t;
const int MOD = 1000000007; // 10^9+7

int main() {
    double n, m, d;
    cin >> n >> m >> d;

    double ans;
    if (d == 0) {
        ans = (m - 1) / n;
    } else {
        ans = 2 * (n - d) * (m - 1) / (n * n);
    }
    cout << fixed << setprecision(10) << ans << endl;
}
