#include <bits/stdc++.h>
#define int ll
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
#define vec(...) vector<__VA_ARGS__>
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}

void slv(){
	int a,b,m;
	cin>>a>>b>>m;

	int ans=0;
	rep(x,m/b+1){
		int now=x*(b/a+1)+2;
		// print(ans);
		int rem=m-b*x;
		int y=b%a;
		int need=a-y;
		rem/=need;
		if(x>=rem) now+=rem;
		else{
			now+=x;
			rem=m-b*x;
			rem-=x*need;
			now+=rem/a;
		}
		ans=max(ans,now);
		// print(now,x);
		// print(ans,need,rem);
	}
	// print(ans);
	print(ans*160);
}

signed main(){
	ios::sync_with_stdio(0),cin.tie(0);
	int t;
	cin>>t;
	rep(cs,t){
		slv();
	}
}