import std.stdio, std.string, std.conv;
import std.range, std.algorithm, std.array, std.typecons, std.container;
import std.math, std.numeric, core.bitop;


void main() {
    int n;
    scan(n);
    auto a = readln.split.to!(int[]);
    int m;
    scan(m);
    auto b = readln.split.to!(int[]);

    long num, den;
    num = den = 1;

    num = a[0];

    foreach (i ; 0 .. m) {
        if (i & 1) {
            num *= b[i];
        }
        else {
            den *= b[i];
        }
    }

    foreach (i ; 0 .. n) {
        if (i > 0) {
            den *= a[i];
        }
    }


    if (sgn(den) == sgn(num)) {
        den = abs(den);
        num = abs(num);
    }
    else {
        den = abs(den);
        num = -abs(num);
    }

    long g = gcd(abs(num), abs(den));
    num /= g;
    den /= g;

    writefln("%d %d", num, den);
}


int sgn(long x) {
    return x > 0 ? 1 : -1;
}






















void scan(T...)(ref T args) {
    import std.stdio : readln;
    import std.algorithm : splitter;
    import std.conv : to;
    import std.range.primitives;

    auto line = readln().splitter();
    foreach (ref arg; args) {
        arg = line.front.to!(typeof(arg));
        line.popFront();
    }
    assert(line.empty);
}


void fillAll(R, T)(ref R arr, T value) {
    static if (is(typeof(arr[] = value))) {
        arr[] = value;
    }
    else {
        foreach (ref e; arr) {
            fillAll(e, value);
        }
    }
}