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

/**************************************************************
	Problem: 1129
	User: fzy001
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/