import std;

void main () {
    int T = readln.chomp.to!int;
    foreach (_; 0..T) {
        int M = readln.chomp.to!int;
        int[] d = readln.split.to!(int[]);
        solve(M, d);
    }
}

void solve (int M, int[] d) {
    /* 条件がゆるいので、先に必要条件だけ揃えて後は端の方で調整する */
    long X = 0;
    int radix = 0;
    foreach (i; 0..d.length) {
        foreach (j; 0..d[i]) {
            X += (i+1)*10L^^radix;
            radix++;
        }
    }

    X *= 10L^^9;
    long cur = X % M;

    X += M - cur;

    writeln(X);
}

void read (T...) (string S, ref T args) {
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}