#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 x, y, D;
        cin>>D>>x>>y;
        long ans = 0;
        for(long t=0; t<1<<20; t++) {
            long j = x - t*y;
            long i = y + t*x;
            if(i<0 || i>D || j<0 || j>D) break;
            ans = max(ans, abs(x*i - y*j));
        }
        for(long t=0; t> -1*1<<20; t--) {
            long j = x + t*y;
            long i = y - t*x;
            if(i<0 || i>D || j<0 || j>D) break;
            ans = max(ans, abs(x*i - y*j));
        }
        cout<<ans<<endl;
    }
}