import std;

void main () {
    int A, B, C, D; readln.read(A, B, C, D);

    int ans = 0;
    foreach (i; 0..2000) {
        if (i * A <= C && i * B <= D) ans = i;
    }

    writeln(ans);
}

void read (T...) (string S, ref T args) {
    import std.conv : to;
    import std.array : split;
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}