#include <iostream>
#include <math.h>

unsigned long Distance( std::istream& in )
{
	double v;
	int t;
	in >> v >> t;
	const auto MAG_TEMP = 10000ul;
	auto v1 = static_cast< unsigned long >( round( v * MAG_TEMP ) );
	auto distance = ( v1 * t ) / MAG_TEMP;
	return distance;
}

int main() {
	std::cout << Distance( std::cin ) << std::endl;
	return 0;
}