How many Pages?

Time Limit: 1 sec

 

The Problem

Diya finished 2/3 of a book. She calculated that she has P more pages yet to read. How long is her book?

 

 

The Input

Input will be a number P (P<1000) in each Line.

 

The Output

You have to print the total pages of the book.

 

Sample Input

129

 

Sample Output

387

 

 

 

 

 

Problem Setter: Parag Paul