#include <bits/stdc++.h>
using namespace std;
signed main()
{
    long long x, y, z; // Nhap vao 3 so nguyen la x, y va z
    cin >> x >> y >> z; 
    cout << (x-y)*z;
}

\begin{array}{c} \color{lightblue}{\texttt{#Ileveledupalone}} \end{array}

`C++`

#include <bits/stdc++.h>
using namespace std;
int main() 
{
    long long x, y, z;
    cin >> x >> y >> z;
    cout <<  (x - y) * z << endl;

    return 0;
}

`Python`

x, y, z = map(int, input().split())

print((x - y) * z)