/* 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 Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
    double d1 = 0.979;
    double d2 = 3;
    double d3 = 21;
    double d4 = d1 * d2 / d3;
    double r15 = Math.round(d4 * 1e15) / 1e15;
    System.out.println("r15 " + r15);
	}
}

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