#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); ++i)

void solve() {
  int m;cin>>m;
  int n = 9;
  vector<int> a(n);
  rep(i, n) cin>>a[i];
  string ans = "";
  rep(i,n) {
    rep(j, a[i]) ans += to_string(i+1);
  }
  cout << stoll(ans) * m << endl;
}

int main() {
  int t;cin>>t;
  while(t--) solve();
  return 0;
}