#include<bits/stdc++.h> using namespace std; int main() { long long a,c; char b; char d; cin>>a>>b>>c>>d; cout<<a*c<<endl; return 0; }

#include<bits/stdc++.h>

using namespace std;

int main()

{

long long a,c;

char b;

char d;

cin>>a>>b>>c>>d;

cout<<a*c<<endl;

return 0;

}