contests/Codechef_Starters_41/B/main.cpp


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#include<bits/stdc++.h>

using namespace std;

int main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tt;
  cin >> tt;
	while(tt--){
    int x, y , z;
    cin >> x >> y >> z;
    cout << (x * 5 + y * 10) / z << endl;

	}
}