#include <iostream>
#include <map>
using namespace std;
const int N=302;
int a[N][N];
map<int,int> cnt[N][N];
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int r,s,n;
cin>>r>>s>>n;
for(int i=1;i<=r;i++)
{
for(int j=1;j<=s;j++)
{
cin>>a[i][j];
}
}
cnt[1][1][a[1][1]]++;
for(int i=1;i<=r;i++)
{
for(int j=1;j<=s;j++)
{
if(i==1 and j==1)continue;
// merge cnt[i][j-1] and cnt[i-1][j]
for(auto [w,c]:cnt[i][j-1])
{
if(1ll*w*a[i][j]>=n)
{
cnt[i][j][n]+=c;
}
else
{
cnt[i][j][w*a[i][j]]+=c;
}
}
for(auto [w,c]:cnt[i-1][j])
{
if(1ll*w*a[i][j]>=n)
{
cnt[i][j][n]+=c;
}
else
{
cnt[i][j][w*a[i][j]]+=c;
}
}
}
}
cout<<cnt[r][s][n]<<endl;
}
