#include <iostream>
using namespace std;
typedef long long ll;
ll extgcd(ll a,ll b,ll &x,ll &y)
{
    int d=a;
    if(b!=0)
    {
        d=extgcd(b,a%b,y,x);
        y-=(a/b*x);
    }
    else
    {
        x=1;y=0;
    }
    return d;
}
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        ll a,b,c;
        cin>>c>>a;
        b=9973;
        ll x=0,y=0;
        extgcd(a,b,x,y);
        x%=b;
        while(x<0)x+=b;
        x=(x*c)%b;
        cout<<x<<endl;
    }
    return 0;
}