from math import floor, ceil

T = int(input())
for _ in range(T):
    N, S = input().split()
    N = int(N)
    S1000= int(S.replace('.', ''))

    ans = 0
    for k in range(1, min(N+1, 1000)):
        l = ceil(S1000 * k / 1000)
        r = floor((S1000+1) * k / 1000 - 1e-9)
        if l <= r:
            ans += 1
    ans += len(range(1000, N+1))

    print(ans)