Do you have any experience play idle style game?
Yap, as the title,This source is BigInteger Helper for suffixes alphabet [a-Z] after the Big number
Include the source code in your C# project and use it.
/* Result : 10A*/
BigIntegerManager.GetUnit(10000);
/* Result : 1.3A*/
BigIntegerManager.GetUnit(1317);
/* Result : 100000000000000000000000000000000000000000000000000000000000000000000000000000000000 */
BigIntegerManager.ToUnit("100Z")
/* Result : 1500 */
BigIntegerManager.ToUnit("1.5A")