#include <iostream>
#include <complex>
using namespace std;
int main(void){
    long double a, b, c, d;
    cin >> a >> b >> c >> d;
    complex<long double> cp1(a, b), cp2(c, d);
    complex<long double> cp3 = cp1 * cp2;
    cout << (long long)cp3.real()  << " " << (long long)cp3.imag() << endl;
}