include <bits/stdc++.h>

define ll long long

using namespace std; int main() { ll n,m; cin>>n>>m; ll variable=n-1; ll answer=m3variable; cout<<answer; return 0; }

include <iostream>

using namespace std; int main() { long long n, m; cin>>n>>m; cout<<(n - 1)m3; return 0; }

include <stdio.h>

long i,n,s; int main() { scanf("%ld",&n); s=n(n+1)(2*n+1)/6; printf("%ld\n",s); return 0; }

include <bits/stdc++.h>

using ll = long long;

using namespace std;

int main(){ ll n , m , q; cin >> n >> m; q = (n - 1) * (m * 3); cout << q; }

include<stdio.h>

include<math.h>

int main (){ long long a,b; scanf("%lld %lld",&a,&b); long long d=(a-2)+1; long long s=db; printf("%lld",s3); }