#include <bits/stdc++.h>
using namespace std;
int main(){
	char oo;
	long long int i,o;
	cin>>i>>oo>>o>>oo;
	cout<<i*o;
	return 0;
}

/**************************************************************
	Problem: 1129
	User: zhouhongyi
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/