import sys
from fractions import Fraction
import math

def read_line():
    while True:
        line = sys.stdin.readline().strip()
        if len(line) > 0:
            return line


def ask(x: int):
    print('?', x, 1, flush=True)
    p, q = map(int, read_line().split())
    return p / q

def solve():
    n = int(read_line())

    xs = []
    for i in range(n):
        x, _ = map(int, read_line().split())
        xs.append(x)
    xs = list(sorted(xs))

    answers = [0.0 for _ in range(n)]
    for i in range(1, n - 1):
        answers[i] = ask(xs[i])
    S = 0.0
    for i in range(0, n - 1):
        S += (xs[i + 1] - xs[i]) * (answers[i] + answers[i + 1])
    S = int(round(S))
    S = Fraction(S, 2)
    
    print('!', S.numerator, S.denominator, flush=True)


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