How to Make Money

Today Vasya found a great way to earn money. He offers his diary to Pete for p rubles a day. There are days when Peter is not quite successfully wrote a particular control, the results of which, of course, recorded in his diary. And in order not to upset his family, he rents a diary Vasya. Vasya learnt the basics of the economy, so to attract the customers he says that every m-th day of rental costs completely free.

Peter rented a diary for n days. Now Vasya is trying to figure out how many rubles it will receive as a result of this transaction.

Input

Three positive integers n, m and p (n, m, p < 10001).

Output

Print Vasya's profit.

Examples