#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=(a);i<=(b);i++)
#define endl '\n'
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
int main(){
    fastio;
    int n,m;
    cin>>n>>m;
    cout<<n*m*6<<endl;
    return 0;
}