// 

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

#define rep(i, n) for (int i=0; i<(int)(n); ++(i))
#define rep3(i, m, n) for (int i=(m); (i)<(int)(n); ++(i))
#define repr(i, n) for (int i=(int)(n)-1; (i)>=0; --(i))
#define rep3r(i, m, n) for (int i=(int)(n)-1; (i)>=(int)(m); --(i))
#define all(x) (x).begin(), (x).end()

int main() {
    int h, w, la, lb;
    ll ka, kb;
    cin >> h >> w >> la >> lb >> ka >> kb;
    int lval = 0, rval = (h+la-1) / la + (w+lb-1) / lb;
    auto calc = [&](int ai, int bi) -> bool {
        ll tval = min((ll)ai*la, (ll)h) * min((ll)bi*lb, (ll)w);
        return (((ll)h * w - tval) <= (ai * ka + bi * kb));
    };
    while (rval-lval > 1) {
        int cval = rval - (rval-lval) / 2;
        bool ok = false;
        rep(i, cval+1) if (calc(i, cval-i)) {
            ok = true;
            break;
        }
        if (ok) rval = cval;
        else lval = cval;
    }
    cout << rval << endl;
    return 0;
}