T = int(input())
for _ in range(T):
    N, S = map(str, input().split())
    IN = int(N)
    IS = int(S[:-4]) * 1000 + int(S[-3:])
    ans = 0
    for i in range(min(IN + 1, 1000)):
        if (IS * i - 1) // 1000 != ((IS + 1) * i - 1) // 1000:
            ans += 1
    ans += max(0, IN - 1000 + 1)
    print(ans)