#include <bits/stdc++.h>
using namespace std;
int main() {
  double a, b, ans = INT_MAX;
  cin >> a >> b;
  while (a--) {
    double x, y;
    cin >> x >> y;
    ans = min(ans, b * x / y);
  }
  cout << setprecision(6) << fixed << ans << "\n";
}
