求解计算公式替换
计算公式：(mc380a*100.2+mc380b*2)/3600/mc380b12+mc380ac*4.9
运算符：+ - * /
替换字符串：
mc380a替换为a1.mc380a
mc380ac替换为a2.mc380ac
mc380b替换为b.mc380b
mc380b12替换为c.mc380b12
替换结果为：(a1.mc380a*100.2+b.mc380b*2)/3600/c.mc380b12+a2.mc380ac*4.9

解出来了，有赏。。
------解决方案--------------------

 string str = "(mc380a*100.2+mc380b*2)/3600/mc380b12+mc380ac*4.9";

            Dictionary<string, string> dic = new Dictionary<string, string>

            {

                {"mc380b12","c.mc380b12"},{"mc380b","b.mc380b"},{"mc380ac","a2.mc380ac"},{"mc380a","a1.mc380a"}

            };

            var chars = new char[] { '*', '/', '+', '-', '(', ')' };

            List<string> list = new List<string>();

            StringBuilder sb = new StringBuilder();

            for (int i = 0; i < str.Length; i++)

            {

                if (chars.Contains(str[i]))

                {

                    if (sb.Length > 0)

                    {

                        list.Add(sb.ToString());

                        sb = new StringBuilder ();

                    }

                    list.Add(str[i].ToString());

                }

                else

                {

                    sb.Append(str[i].ToString());

                }

            }

            if (sb.Length > 0)

            {

           &nb