Open question: How do I compute exactly writing-off on a daily basis?

Well you say that I buy a car on 23 April 2009 for $23.990, which has a life of 5 years with net book value of the zero. On 30 June 2009 (end of the financial year) I compute the writing-off. She prepares, in order $4798 one year to be ($23.990/5). Since I had it only since April 23., how I compute exactly the writing-off? If them are $4798 one year, does she have to be $13,145205 per day, yeah? Do I multiply then straight by the quantity of days, which I had her? If 68 (days) x 13,145205 = 893.87394. How do I note that generally journal? Do do I must round it or everything? Or do you leave it at that? Everything is this, I was surprised straight hypothetically, how one does it that everything is. I mean, if photograph negotiations in the journal, it as full number not truely? did not note like 400 400.588. Before you ask, I am still a class participant in highschool. I have a straight interest in the bookkeeping. Owing to:)