## https://yukicoder.me/problems/no/2624

def solve(N, S):
    s_array = S.split(".")

    s = int(s_array[0]) * 1000 + int(s_array[1])

    ans = 0
    if N >= 1001:
        ans = N - 1000
    
    for n in range(1, min(N, 1000) + 1):
        s1 = s * n
        s2 = s * n + n
        s1 %= 1000
        s2 %= 1000
        if s1 == 0:
            ans += 1
        elif s2 < s1 and s2 > 0:
            ans += 1
    return ans



def main():
    T = int(input())
    answers  = []
    for _ in range(T):
        N, S = input().split()
        ans = solve(int(N), S)
        answers.append(ans)

    for ans in answers:
        print(ans)


if __name__ == "__main__":
    main()