#include <bits/stdc++.h>
using namespace std;
double matrix[100][100];
double matrix1[100][100];
double ans[100][100];

void MatrixMul(int n1,int n2,int n3){

	bzero(ans,0);
	for(int i = 0; i < n1; i++){
		for(int j = 0; j < n3; j++){
			for(int k = 0; k < n2; k++){
				ans[i][j] += matrix[i][k]*matrix1[k][j];
			}
		}
	}

}
void perspective_projection(double x,double y,double z,double d){
	bzero(matrix,0);
	matrix[0][0] = 1;
	matrix[1][1] = 1;
	matrix[2][2] = 1;
	matrix[3][2] = 1/d;

	matrix1[0][0] = x;
	matrix1[1][0] = y;
	matrix1[2][0] = z;
	matrix1[3][0] = 1;
	MatrixMul(4,4,1);
	//cout<<"x' = "<<(ans[3][0]!=0?ans[0][0]/ans[3][0]:ans[0][0])<<endl;
	if(ans[3][0] != 0)
	{
		cout<<"x' = "<<ans[0][0]/ans[3][0];
		cout<<endl;
	}
	else
	{
		cout<<"x' = "<<ans[0][0];
		cout<<endl;
	}
	
	if(ans[3][0] != 0)
	{
		cout<<"y' = "<<ans[1][0]/ans[3][0];
		cout<<endl;
	}
	else
	{
		cout<<"y' = "<<ans[1][0];
		cout<<endl;
	}
	
	if(ans[3][0] != 0)
	{
		cout<<"z' = "<<ans[2][0]/ans[3][0];
		cout<<endl;
	}
	else
	{
		cout<<"z' = "<<ans[2][0];
		cout<<endl;
	}
}
int main()
{
	double x,y,z,d;
	cin>>x>>y>>z>>d;
	perspective_projection(x,y,z,d);
}