#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
using ll = long long;
using ld = long double;
const ll mod = 998244353;
#define fi first
#define se second
#define rep(i, n) for (ll i = 0; i < n; i++)
#define all(x) x.begin(), x.end()
#define faster                   \
    ios::sync_with_stdio(false); \
    cin.tie(nullptr)

int main() {
    ll T;
    cin >> T;
    while (T--) {
        ll N;
        cin >> N;
        ld S;
        cin >> S;
        ll X = (ll)(S * 1000 + 0.5);
        ll ans = 0;
        if (N >= 1000) ans += N - 1000;
        for (ll i = 1; i <= min(N, (ll)1000); i++) {
            ll x1 = X * i;
            ll x2 = (X + 1) * i - 1;
            if (x1 % 1000 == 0 || x1 / 1000 != x2 / 1000) ans++;
        }
        cout << ans << endl;
    }
    return 0;
}