#include <iostream> #include <math.h> unsigned long Distance( std::istream& in ) { double v, t; in >> v >> t; const auto MAG_TEMP = 10000ull; auto v1 = static_cast< unsigned long long>( round( v * MAG_TEMP ) ); auto t1 = static_cast< unsigned long long>( round( t * MAG_TEMP ) ); auto distance = ( v1 * t1 ) / ( MAG_TEMP * MAG_TEMP ); return distance; } int main() { std::cout << Distance( std::cin ) << std::endl; return 0; }