static void getOutput(int valueInt, out string output)
{
    double value = valueInt;
    output = "";
    while (value >= 1000)
    {
        output = output == "" ? "k" : output == "k" ? "M" : "G";
        value /= 1000;
    }
    if (value < 1)
    {
        output = "m";
        value *= 1000;
    }
    value = (int)value / 100 > 0 ? Math.Round(value, 1) : (int)value / 10 > 0 ? Math.Round(value, 2) : Math.Round(value, 3);
    output = value.ToString() + output;
}