#include <bits/stdc++.h>
#define x first
#define y second
using namespace std;
using ll=long long;
using pii=pair<int,int>;
using vi=vector<int>;
using vl=vector<ll>;
#define pb push_back
#define all(a) begin(a),end(a)

const int N=300010,MOD=1e9+7;
const ll LLINF=1ll<<60;
const char en='\n';

int t,a,b,m;

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin>>t;
	while (t--)
	{
		cin>>a>>b>>m;
		int ma=0;
		if (a>=b)
		{
			for (int ca=0;ca*a<=m;++ca)
			{
				int cb=(m-ca*a)/b;
				ma=max(ma,ca*2+cb);
			}
		}
		else
		{
			for (int cb=0;cb*b<=m;++cb)
			{
				int ca=(m-cb*b)/a;
				ma=max(ma,cb*(b/a+1)+ca+ca/((b+a-1)/a));
				//cout<<ca<<' '<<cb<<' '<<ma<<en;
			}
		}
		cout<<(ma+2)*160ll<<en;
	}
}