Respuesta :
I'm not sure what you are trying to convey, but you cannot have more than one digit, so this is imposible
8 x 1000 + 15 x 100 + 15 x 10 + 18 x 1
= 8000 + 1500 + 150 + 18
= 9500 + 168
= 9668
= 8000 + 1500 + 150 + 18
= 9500 + 168
= 9668