#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e18;

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int T; cin>>T;
    while(T--) {
        long long x, y, D;
        cin>>D>>x>>y;
        long long ans = 0;

        {
            long long mt = min((D-y)/x, x/y);
            long long i = y+mt*x;
            long long j = x-mt*y;
            ans = max(ans, abs(x*i - y*j));
        }
        {
            long long mt = min((D-x)/y, y/x);
            long long i = y-mt*x;
            long long j = x+mt*y;
            ans = max(ans, abs(x*i - y*j));
        }
        cout<<ans<<endl;
    }
}