Hi i need help

Question

const int dim = 10;
int n = 0;
cout << "5 Stellige Nummer: ";
cin >> n;

if (n >= 10000 && n <= 99999) {
for(int i=1; i<=5; i++) {
int j = n%dim; // What makes it ?
n = n/dim; // and it ?
cout << i << "-e Teil: " << j << endl;
}
}
else {
cout << "Nummer soll 5Stellig sein!" << endl;
}
system("pause");