According to the Indraloka Gamana Parva, Vana Parva, Mahabharata, when Arjuna goes to Svarga during his 13 years exile before the war, he lived there for five years. Now if we take this calculation in earthly terms, 1 year of the devas is 360 years for us. So five years would be 5x360=1800 years on earth! Yet Arjuna was gone only for five earth years, which would mean five days on Svarga.
There is an alternate possibility of Arjuna having visited the city of Indra on the Meru Mountain, which is on earth. But this is not described in the Mahabharata. So how is this time difference reconciled?