#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001


int main(){
	
	int _t;
	cin>>_t;
	
	rep(_,_t){
		long long n;
		cin>>n;
		long long S;
		{
			double s;
			cin>>s;
			s *= 1000;
			S = round(s);
		}
		
		long long ans = 0;
		for(long long i=1;i<=min(n,1000LL);i++){
			long long t = i * S;
			long long tt = i * (S+1) - 1;
			if(t/1000!=tt/1000 || t%1000==0)ans++;
		}
		ans += max(0LL,n-1000);
		
		cout<<ans<<endl;
		
	}
	
	return 0;
}