/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Solution {
    public static void main(String[] args) {
        System.out.println(getWeight(888));
    }

    public static double getWeight(int weightEarth) {
        return weightEarth / 100. * 17;
    }
}