#include<bits/stdc++.h>
using namespace std;
int main()
{
	int t,a,b,s;
	cin>>t;
	while(t--)
	{
		cin>>a>>b>>s;
		if(a<=b)
		{
			cout<<s*b/a+s<<endl;
		}
		else
		{
			cout<<s+s*a/b<<endl;
		}
	}
	return 0;
}

qt