import java.io.*;
import java.util.*;
public class DataProcessor {
public static void main(String[] args) {
try {
File file = new File("data.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
List<Double> data = new ArrayList<>();
while ((line = br.readLine()) != null) {
double value = Double.parseDouble(line);
data.add(value);
}
List<Double> transformedData = new ArrayList<>();
for (Double value : data) {
transformedData.add(value * 2);
}
for (Double value : transformedData) {
System.out.println(value);
}
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
