#include <iostream>
#include <queue>

using namespace std;

int main() {

    double answer = 1000000, min_first_part, curr;
    queue<double> waiting;

    cin >> min_first_part;
    for (int i = 0; i != 5; ++i) {
        cin >> curr;
        waiting.push(curr);
    }

    while (cin >> curr) {
        answer = min(answer, min_first_part * curr);
        min_first_part = min(min_first_part, waiting.front());
        waiting.pop();
        waiting.push(curr);
    }

    cout << answer << '\n';
    return 0;
}