How have you been?
It depends on what you want to say.
프랑스하고 이탈리아에서 걸 거예요.
Korean basic verb 걸다 has various meaning - hang, call, suit
This sentence can translate into - I'll 걸다 in France and Italy.
프랑스에서 하고 이탈리아에서 걸 거예요.
하다 is very similar with 'do'
So, If I translate - I'll 하다 in France and 걸다 in Italy.