#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int t;
    cin >> t;
    while(t--){
        ll n;
        string s;
        cin >> n >> s;
        ll v = 0;
        rep(i,s.size()) {
            if(s[i]=='.') continue;
            v *= 10;
            v += s[i]-'0';
        }
        ll ans = 0;
        for(ll i=1;i<=min(n,(ll)1000);i++){
            int l = i*v/1000;
            int r = i*(v+1)/1000;
            dbg(i*v, i*(v+1));
            dbg(l,r);
            if(l!=r && (i*(v+1))%1000!=0){
                ans++;
            }
            else if((i*v)%1000==0) ans++;
            // if((i*v)/1000!=(i*(v+1))/1000) ans++;
        }
        ans += max(n-1000, 0ll);
        cout << ans << endl;
    }
    return 0;
}