题解 | 牛牛爱数学

#include<bits/stdc++.h>
using namespace std;
#define int long long 

void solve()
{
    int a,b,c;
    cin>>a>>b>>c;
    unsigned int sum=b*c;
    if(sum%a==0)
    {
        cout<<sum/a<<"\n";
    }
    else cout<<-1<<"\n";
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0),cout.tie(0);
    int t__=1;
    cin>>t__;
    while(t__--)
    {
        solve();
    }
    return 0;
}