import sys
from fractions import Fraction

def ask(x: Fraction):
    print('?', x.numerator, x.denominator)
    sys.stdout.flush()
    p, q = map(int, input().split())
    return Fraction(p, q)

def solve():
    try:
        n = int(input())

        pts = []
        for i in range(n):
            x, y = map(int, input().split())
            pts.append((Fraction(x), Fraction(y)))

        pts = list(sorted(pts))
        answers = [Fraction(0) for _ in range(n)]
        for i in range(1, n - 1):
            answers[i] = ask(pts[i][0])
        S = Fraction(0)
        for i in range(0, n - 1):
            S += (pts[i + 1][0] - pts[i][0]) * (answers[i] + answers[i + 1])
        S /= 2
        print('!', S.numerator, S.denominator)
        sys.stdout.flush()
    except:
        pass


if __name__ == "__main__":
    t = int(input())
    for _ in range(t):
        solve()