// a sarkany feladvany.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
#include <string>
using namespace std;
long long a, b, c, i, j, l, lkkt, szam, r, p;
string s;
int main()
{
for (i = 1; i <= 3; ++i)
{
cin >> a >> b >> l;
p = a * b;
r = a % b;
while (r>0)
{
a = b;
b = r;
r = a % b;
}
szam = lkkt = p / b;
s = to_string(szam);
if (s.size() <= l)
{
cout << lkkt;
for (j = 1; j <= l - s.size(); ++j) cout << 0;
}
else cout << -1;
cout << "\n";
}
}
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file