Problem A. Asphalt

Author:M. Sporyshev   Time limit:1 sec
Input file:Standard input   Memory limit:512 Mb
Output file:Standard output  

Statement

Young road constructor Vasya decided to pave a road with asphalt. The road is a straight line segment L meters long.

Vasya can pave a continuous segment of A meters of road per day. To avoid potential cracks on the borders between segments paved on different days, Vasya decided to overlap segments. Specifically:

Your program must calculate the total number of meters that Vasya will pave.

Input format

Input contains three integers L A B.

Output format

Output must contain a single integer — the total number of meters paved.

Constraints

1 ≤ L, A, B ≤ 100

A > B

Sample tests

No. Standard input Standard output
1
10 5 3
19
2
4 5 3
4
3
5 5 3
5

0.218s 0.015s 13