/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.math.BigDecimal;
import java.text.DateFormat;
import java.text.DecimalFormat;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		BigDecimal bigDecimal = new BigDecimal(10.135);
		DecimalFormat formatter = new DecimalFormat();
		formatter.setMaximumFractionDigits(4-bigDecimal.precision()+bigDecimal.scale());
		System.out.println(formatter.format(bigDecimal));
	}
}

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