#include<iostream.h>
#include<fstream.h>
#include<time.h>
#include<stdio.h>
int a[53][53],x2,y2,min=20000;
void bizz (int i,int j, int s)
{
	int b;
	if ((a[i][j]==0)||(a[i][j]==-1)||((i==x2)&&(j==y2)))
	{
		if ((i==x2)&&(j==y2)) if (s<min) min=s;
	}
	else 
	{
		b=a[i][j];
		a[i][j]=0;
		bizz (i+1,j,s+1);
		bizz (i-1,j,s+1);
		bizz (i,j+1,s+1);
		bizz (i,j-1,s+1);
		a[i][j]=b;
	}
}
void nezz (int i,int j,int k,int s)
{
	int b,z;
		for (z=a[i][j]/2;z>1;z--)
		{
			if (a[i][j]%z==0)
				if (k%z==0)
					k=k/z;
		}
		b=a[i][j];
		a[i][j]=0;
		if (k==1) {a[i][j]=b;bizz(i,j,s);a[i][j]=0;}
		else
		{
		if ((a[i+1][j]!=0)&&(a[i+1][j]!=(-1)))nezz (i+1,j,k,s+1);
		if ((a[i-1][j]!=0)&&(a[i-1][j]!=(-1)))nezz (i-1,j,k,s+1);
		if ((a[i][j+1]!=0)&&(a[i][j+1]!=(-1)))nezz (i,j+1,k,s+1);
		if ((a[i][j-1]!=0)&&(a[i][j-1]!=(-1)))nezz (i,j-1,k,s+1);
		}
		a[i][j]=b;
}
int main()
{
	clock_t start,end;
	start=clock();
	int x1,y1,i,j,n,m,k;
	fstream f,g;
	f.open("kdrum.in",ios::in);
	g.open("kdrum.out",ios::out);
	f>>n>>m>>k;
	f>>x1>>y1>>x2>>y2;
	for (i=0;i<n+2;i++)
		for (j=0;j<m+2;j++)
			a[i][j]=-1;
	for (i=1;i<=n;i++)
		for (j=1;j<=m;j++)
			f>>a[i][j];
	nezz (x1,y1,k,1);
	g<<min;
	end=clock();
	printf ("%.3f",(float)(end-start)/(float)CLOCKS_PER_SEC);
	return 0;
}