/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.math.*;
 
/* 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
	{
		// your code goes here
		BigDecimal b1 = new BigDecimal("4.2597");
 
		MathContext m = new MathContext(4); // 4 precision
 
		// b1 is rounded using m
		BigDecimal b2 = b1.round(m);
 
		// Print b2 value
		System.out.println("The value of " + b1 +
		" after rounding is " + b2);
	}
}

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