#include <stdio.h>
double mul(double x,double y);
int main(void) {
	double x;
	double y;
	scanf("%lf",&y);
	scanf("%lf",&x);
	printf("x:%lf y:%lf",x,y);
	printf("x*y=%lf",mul(x,y)); 
	return 0;
}
double mul(double x,double y){
	return x*y;
}