import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons;
import core.bitop;

class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }

string COLOR(string s = "") { return "\x1b[" ~ s ~ "m"; }

bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }

int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }




void main() {
  try {
    for (; ; ) {
      const N = readInt;
      auto A = new int[N];
      auto P = new long[N];
      foreach (i; 0 .. N) {
        A[i] = readInt;
        P[i] = readLong;
      }
      
      const maxA = A.maxElement;
      auto pss = new long[][maxA + 1];
      foreach (i; 0 .. N) {
        pss[A[i]] ~= P[i];
      }
      
      foreach (a; 1 .. maxA + 1) {
        pss[a].sort!"a > b";
      }
      
      long ans;
      foreach (d; 1 .. maxA + 1) {
        // maxi. min{p / (b/d), q / (a/d)}
        alias Entry = Tuple!(long, "a", long, "p");
        Entry[] es;
        for (int a = d; a <= maxA; a += d) {
          foreach (index, p; pss[a]) {
            if (index >= 2) break;
            es ~= Entry(a, p);
          }
        }
        es.sort!((e, f) => (e.a * e.p < f.a * f.p));
        foreach (j; 1 .. cast(int)(es.length)) {
          const p = es[j - 1].p;
          const b = es[j].a;
          chmax(ans, d * p / b);
        }
      }
      writeln(ans);
    }
  } catch (EOFException e) {
  }
}