Hi, could I get some help with this macro-connection physics problem involving isothermal expansion?

The set up is:

For an isothermal reversible expansion of two moles of an ideal gas, what is the entropy change of the a) gas and b) the surroundings in J/K to 4 digits of precision if the gas volume quadruples, assuming N_A = 6.022e23 and k_B = 1.38e-23 J/K?

Thank you.