/* 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
	{
		int n,m; 
		Scanner in = new Scanner(System.in);
		n=in.nextInt();
		m=in.nextInt();
		double [][] A = new double [n][m];
		for (int i=0; i<n; i++){
	   		for (int j=0; j<m; j++){
				A[i][j]=in.nextDouble();
			}
		 }
		for (int i = 0; i < n; i++){
			for (int j = 0; j < m; j++){
				if (A[i][j]!=0){
					A[i][j]=-(1/A[i][j]);
				}
			}	
		}
		for (int i = 0; i < n; i++){
			for(int j = 0; j < m; j++){
				System.out.printf("%.6f ",A[i][j]);
			}
			System.out.println();
		}		
	}
}

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Mwo0CjIgMCAzIDYKMSAwIDEgMgo5IDAgNyA4

3
4
2 0 3 6
1 0 1 2
9 0 7 8