Any way to get around exceeding maximum positive number?

Wrote

Any way to get around exceeding maximum positive number?

Sometimes this error appear in symbolic calculation due to the symbolic engine procedures applied. Sometimes it could be avoided by using "eval" or "round". If the numerical calculation gives that error, it can not be avoided because of computer floating point restrictions.

Regards,
Radovan

I am calculating the energy of pressurized gas and it works fine using "eval." Thanks for your help!