#include <iostream>
#include <string>
#include <vector>

int main(void)
{
	double v, t, i;
	char s[16];
	std::cin >> v >> t;

	i = v * t;
	snprintf(s, sizeof(s), "%lf", i);
	std::vector<char> a;
	int j;
	for (j = 0; s[j] != '.'; j++) a.push_back(s[j]);

	for (auto it : a) std::cout << it;
	std::cout << std::endl;

	return 0;
}