public static Int32CheckedNoThrow?operator *(Int32CheckedNoThrow?first, Int32CheckedNoThrow?second)
 {
     if (first.HasValue && second.HasValue)
     {
         if (CheckedNoThrow.TryMultiply(first.GetValueOrDefault(), second.GetValueOrDefault(), out var result))
         {
             return(result);
         }
     }
     return(null);
 }