/* 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
	{
		// your code goes here
    double m[];
    double v[];
 
    m[0] = 2.0e31;
    v[0] = 0.424e105;
 
    m[1] = 2.0e32;
    v[1] = 1.34e5;
 
    m[2] = 4.0e32;
    v[2] = 1.9e5;
 
    m[3] = 4.0e33;
    v[3] = v[2] * v[1] / v[0];
 
    System.out.println(v[3]);
 
    for(i=0;i<4;i++){
    m[i] = null;
    v[i] = null;
	}
}

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